Track my due date

Calculate your due date: How to find your baby's due date

Choose a calculation method Last periodConception dateI know my due date

First day of my last period

BabyCenter's Due Date Calculator

Use our pregnancy due date calculator by plugging in either the date of your last menstrual cycle or the date you know you conceived. The calculator will do the rest.

How is my due date calculated?

There are several ways your due date is determined. If you happen to know the day you conceived, you can count 38 weeks from that day to find your due date. (Human gestation takes about 38 weeks.)

But very few expectant moms know exactly when they conceived. Even if you only had sex once during your fertile period, you wouldn't conceive on that day unless you happen to be ovulating. Sperm can live for up to five days inside your fallopian tubes. So, it could be up to five days after you have sex that you release an egg (ovulate) and it gets fertilized by a waiting sperm. That's the day you conceive.

So, without knowing the day of conception, how does anyone determine a due date?

First day of your last period

The most common way to calculate your pregnancy due date is by counting 40 weeks from the first day of your last menstrual period (LMP). And that's how most healthcare providers do it.

If your menstrual cycle length is the average length (28-day cycle), your menstrual cycle probably started about two weeks before you conceived. This explains why pregnancies are said to last 40 weeks instead of 38 weeks.

This method doesn't take into account how long your menstrual cycle actually is or when you think you might have conceived. But generally speaking, women typically ovulate about two weeks after their menstrual cycle starts. And women are more likely to know when their last period started than the day they ovulated.

Conception date

If you do happen to know precisely when you conceived – say, if you were using an ovulation predictor kit or tracking your ovulation symptoms – you can calculate your pregnancy due date based on your conception date. Just choose that calculation method from the pulldown above and put in your date.

Note: Again, you don't necessarily conceive on the day you have sex.

IVF transfer date

If you conceived through IVF, you can calculate your due date using your IVF transfer date. If you had a Day 5 embryo transfer, count 261 days from your transfer date. If you had a Day 3 embryo transfer, count 263 days.

Can my due date change?

Your healthcare provider might revise your due date if your baby is measured during a first trimester ultrasound scan and found to be much bigger or smaller than expected for gestational age. This is more likely to happen if you have an irregular menstrual cycle length that makes it hard to pinpoint the date of conception.

Your healthcare provider will measure your baby during that ultrasound exam to figure out how far along your baby is and then provide you with a new due date.

What if I already know my due date?

If you already know your due date, you can use this calculator to see your pregnancy timeline. It will tell you when you'll hit various milestones, and when you may be due for prenatal tests and prenatal visits. You'll also find what your baby's sign and birthstone will probably be and which famous people were born on your due date.

How likely am I to give birth on my due date?

Of course, a due date calculation is always approximate, whether it's from our tool or from your doctor or midwife. Only 1 in 20 women delivers on their due date. You're just as likely to go into labor any day during the two weeks before or after.

Want more information about how the weeks, months, and trimesters of pregnancy are counted? See our pregnancy timing chart.

How soon can I take a pregnancy test?

With all this talk about pregnancy due dates, you may be wondering when you can take a pregnancy test. To ensure you get the most accurate reading, it's best to wait a few days after your missed period to take a pregnancy test.

At-home urine tests measure the amount of hCG (human Chorionic Gonadotropin) present in your body. If you take a pregnancy test before you miss your period, you may not get an accurate result, despite what some tests advertise.

If you're getting a blood test in your provider's office, you may get results sooner. These tests also measure the amount of hCG in your bloodstream, but they're more sensitive than at-home urine tests. Blood tests may be able to detect pregnancy six to eight days after ovulation.

Read more

Your pregnancy, week by week
Your first trimester pregnancy checklist
Pregnancy Weight Gain Calculator
Ovulation Calculator
See all tools

How many weeks pregnant am I? — Flo

The first day of your last period The day you conceived

Average cycle length

20 days21 days22 days23 days24 days25 days26 days27 days28 days29 days30 days31 days32 days33 days34 days35 days36 days37 days38 days39 days40 days41 days42 days43 days44 days45 days

Please note that Flo Health does not collect, process, or store any of the data that you enter while using these Tools. All calculations are done exclusively in your browser. Flo Health does not have access to the results. All data will be permanently erased after leaving or closing the page.
Our Due Date Calculator is based on a 28-day cycle (cycles can vary from 20 to 45 days), and your period and ovulation are considered to be the first 2 weeks of pregnancy. As this method is affected by the regularity of your menstrual cycle, the due date predictor is not 100% accurate.
Remember that pregnancy due date calculators, birth date calculators, and pregnancy calculators can help you learn more about your estimated due date and pregnancy timeline, but they are not a replacement for medical advice. You should always notify your health care provider that you are pregnant. Sometimes an ultrasound will be needed to date your pregnancy.

You will meet your baby on

date

day

Gestational age is

weeks and day

Gestational age is the age of pregnancy and is counted from the first day of your LMP. So technically it includes two weeks during which you weren't pregnant yet.

Week 1

At 1 week pregnant, you’re actually not pregnant yet. As your pregnancy is calculated from the first day of your last menstruation, your baby does not yet exist, and your body is preparing for the ovulation during which you’ll get pregnant.

Week 2

At 2 weeks pregnant, you’re technically not pregnant yet. Right now there is a lone egg and a whole bunch of anxious sperm eager to fertilize the egg. Your uterus and the entire body are preparing for a big day of ovulation - the stage when you'll get pregnant.

Week 3

Week 3 of pregnancy is the week when the implantation happens. Your body releases chorionic gonadotropin (hCG), which causes an increased production of estrogen and progesterone, and prevents new eggs in the ovaries from ripening. Very soon you'll start experiencing the first symptoms of pregnancy: missed period, nausea, breast changes.

Week 4

At 4 weeks pregnant, your baby is the size of a poppy seed.

At 4 weeks pregnant, your future baby has finally found his home for the next eight months. The blastocyst has arrived from a fallopian tube to your uterus. You can get a positive pregnancy test result at this stage.

Week 5

At 5 weeks pregnant, your baby is the size of a sesame seed.

By week 5, you should have missed your period, which is one of the most obvious sign you're expecting. Under the influence of hormonal changes, you can feel the first signs of pregnancy: breast swelling, fatigue, headache, and back pain.

Week 6

At 6 weeks pregnant, your baby is the size of a lentil.

Starting from pregnancy week 6, you may experience morning sickness. This is the result of hormonal changes occurring in your body. Malaise, breast swelling, darkening of the nipple areola, and frequent urination can bother you, too. In case of bleeding, you should consult your doctor.

Week 7

At 7 weeks pregnant, your baby is the size of a blueberry.

At 7 weeks pregnant, symptoms start kicking in and your uterus almost doubles in size. Be prepared for a possible increase in nausea, fatigue, heartburn, and other pregnancy symptoms. Morning sickness may give a lot of trouble. Try to find some ways to cope with it.

Week 8

At 8 weeks pregnant, your baby is the size of a bean.

At 8 weeks pregnant, you need to plan your first visit to the gynecologist. The doctor will prescribe the necessary tests and examinations for the first trimester of pregnancy. You may feel the growing discomfort of morning sickness. Try to be patient; it usually lasts until the 14th week only.

Week 9

At 9 weeks pregnant, your baby is the size of a cherry.

At 9 weeks pregnant, your baby is already about 0.6–0.7 in (16–18 mm) and weighs about 0.11 oz (3 g). The tail has disappeared; human features are becoming more distinct. The joints of his/her hands and legs can flex; the nipples and hair follicles are developing. Taste buds are beginning to form on the tongue, as well as primary tooth buds in the gums.

Week 10

At 10 weeks pregnant, your baby is the size of a kumquat.

Week 10 of pregnancy is the time when almost all vital organs and tissues of your baby have formed. Now, they are beginning to function and grow rapidly. He or she can swallow amniotic fluid and move their arms and legs. The skin is getting covered with small hair and the fingers have tiny nails. Testes in boys already start to produce testosterone.

Week 11

At 11 weeks pregnant, your baby is the size of a fig.

At 11 weeks pregnant, your baby has already reached 2 in (5 cm) in size. Now, his/her head is half the length of the body, but in the coming weeks, the body will grow enough to make up for it. The fetus skin is so thin and translucent that through it you can see an extensive network of vessels. Placental vessels are expanding to provide the fetus with necessary nutrients and oxygen.

Week 12

At 12 weeks pregnant, your baby is the size of a plum.

At 12 weeks pregnant, your baby weighs about 0.49 oz (14 g). His/her vocal cords are forming, and kidneys are starting to produce urine, filling the bladder. Although you cannot feel it yet, you can see the baby during a sonogram screening (ultrasound).

Week 13

At 13 weeks pregnant, your baby is the size of a pea pod.

Welcome to the last week of the first trimester! Most early pregnancy symptoms will soon be left behind. At 13 weeks pregnant, your baby is constantly growing. Now, he/she is more than 2. 8 in (7 cm) from the top of his/her head to the coccyx.

Week 14

At 14 weeks pregnant, your baby is the size of a peach.

At 14 weeks pregnant, your baby is developing rapidly. In a while, you will be able to feel them moving and kicking. Your body starts actively gaining weight. This occurs due to an increase in blood and lymph volume.

Week 15

At 15 weeks pregnant, your baby is the size of an apple.

At 15 weeks pregnant, your baby your baby is actively drawing in amniotic fluid through his/her nose. Very soon you'll start looking pregnant indeed as your uterus has risen from your pelvic region to your lower abdomen. Time to plan pregnancy shopping!

Week 16

At 16 weeks pregnant, your baby is the size of an avocado.

You’re on week 16 of your pregnancy, and things are really starting to gear up! Your tiny baby is not so tiny anymore, and it most definitely looks like a human baby now. By week 16 of your pregnancy, you’re 4 months in. That means you’re nearly halfway there and only have 5 more months to go!

Week 17

At 17 weeks pregnant, your baby is the size of a potato.

If you’ve been enjoying a relatively subtle pregnancy with very little belly to show for it, that’s probably over now! Your waist will gradually disappear as your uterus moves upwards and out of your pelvis.

Week 18

At 18 weeks pregnant, your baby is the size of a bell pepper.

If you’ve been astonished by your baby’s rapid growth and weight gain over the last few weeks, by week 18 this will start to level off a little — but there’s still lots of big news in your little one’s early life! At this stage, he or she can yawn, stretch, and even make facial expressions like frowning. The baby’s sense of taste is developing, and taste buds can now distinguish between sweet and bitter.

Week 19

At 19 weeks pregnant, your baby is the size of a mango.

At 19 weeks pregnant, your rounded belly is very noticeable. The first hair appears on the baby's head, and the brain areas responsible for the senses — tactile, gustatory, olfactory, visual and auditory — are developing rapidly.

Week 20

At 20 weeks pregnant, your baby is the size of a grapefruit.

Congratulations! You are halfway to meeting your baby. The baby's legs have almost straightened, so from now on, he/she will be measured from head to toe.

Week 21

At 21 weeks pregnant, your baby is the size of a banana.

As a 21 week pregnant woman, you have crossed the halfway line on your journey to becoming a mother. Your baby is getting bigger. You can now definitely feel her presence as she explores the real estate that you’ve prepared for her.

Week 22

At 22 weeks pregnant, your baby is the size of a carrot.

If you are entering the 22nd week of your pregnancy, without doubts it is getting crowded in there! Your baby is growing and invading your space. And your uterus stretches to about 2 cm (0.8 in) above your belly button to fit your growing baby.

Week 23

At 23 weeks pregnant, your baby is the size of a squash.

For many women, being 23 weeks pregnant is an exciting time because you may finally be showing your baby bump! Among other things, your baby’s eyes and lips are taking shape. They will begin to gain weight more weight which will eventually fill out their wrinkly skin.

Week 24

At 24 weeks pregnant, your baby is the size of an eggplant.

At 24 weeks pregnant, your baby is almost a foot long. You could be experiencing a tingling sensation in your joints, which is known as carpal tunnel syndrome. It is a common condition during pregnancy which occurs due to fluid build-up in your joints which results in compression of the median nerve.

Week 25

At 25 weeks pregnant, your baby is the size of a full ear of corn.

Once you reach week 25 of your pregnancy, you’ll be nearing the end of your second trimester. It can feel like times flies! At 25 weeks pregnant, you’re approximately 5 months and 2 weeks along. Your baby has been growing steadily and even though it’s still not ready, it won’t be long before it comes into the world.

Week 26

At 26 weeks pregnant, your baby is the size of a beetroot.

You’re likely to put on between 16 and 22 pounds by now. At one point during this week, your baby will open his or her eyes for the first time. He or she is not yet able to see anything inside of the uterus but will blink closing and opening his or her eyes when falling asleep and waking up.

Week 27

At 27 weeks pregnant, your baby is the size of a cauliflower.

The 27th week of the pregnancy marks the final two weeks of the second trimester. If your baby is more active at night you might suffer from insomnia and have trouble sleeping. Compensate for the lack of sleep time during the night by napping during the day more when the baby is sleeping.

Week 28

At 28 weeks pregnant, your baby is the size of a coconut.

At 28 weeks you are now entering the third trimester of your pregnancy. At this stage, your baby is pretty well-developed. Her organs, tissues, and nerves continue to grow, but she already has all of the systems necessary for survival outside the uterus. Towards the end of the pregnancy, babies start to recognize familiar sounds and voices.

Week 29

At 29 weeks pregnant, your baby is the size of a pomelo.

At 29 weeks pregnant, you're likely to develop varicose veins like 40 percent of expectant moms. It's also a good time to start doing a kick count. Let your doctor or midwife know if you notice that your baby is becoming less active.

Week 30

At 30 weeks pregnant, your baby is the size of a head of cabbage.

At 30 weeks pregnant, you are likely to experience shortness of breath. Your baby is still up high near your rib and is waiting a bit – it is soon expected to drop down into your pelvis.

Week 31

At 31 weeks pregnant, your baby is the size of a head of a zucchini.

At 31 weeks pregnant, your breasts can get leaky producing the first baby’s food – colostrum. This is one of the symptoms that your body is getting ready for the big day. You are likely to experience shortness of breath. This week your baby is going through major nerve and brain development.

Week 32

At 32 weeks pregnant, your baby is the size of a head of lettuce.

At 32 weeks pregnant, your body may start flexing its muscles preparing for the big day. Your baby is also preparing for her debut mastering the skills she’ll need to thrive outside your womb: swallowing, breathing, sucking.

Week 33

At 33 weeks pregnant, your baby is the size of a pineapple.

At 33 weeks pregnant, you may notice that your baby’s movements are affected by your daily routine. Your belly continues to grow and it’s getting even more troublesome to find a comfortable sitting or sleeping position.

Week 34

At 34 weeks pregnant, your baby is the size of a butternut squash.

At 34 weeks pregnant, your breasts could start leaking small amounts of yellowish colostrum. Your baby is already the size of a school bag and weighs as a melon. If you’re worried about your safety at work, time to talk to your employer about maternity benefits.

Week 35

At 35 weeks pregnant, your baby is the size of a honeydew melon.

At 35 weeks pregnant, you may know how your baby’s moving in your womb just by looking at your bump. It can you give you some discomfort and make you a bit breathless. At this point, many moms can’t wait for the baby to get here, while others are feeling a bit anxious about giving birth. Both feelings are completely normal!

Week 36

At 36 weeks pregnant, your baby is the size of a papaya.

At 36 weeks pregnant, your baby is sleeping between 60 and 80% of the time. It has finally moved into your pelvic cavity, the pressure on your diaphragm is released, and lightening happens. Your baby can now open its eyes, suck its thumb, breathe, and recognize voices!

Week 37

At 37 weeks pregnant, your baby is the size of a head of romaine lettuce.

Welcome to your 37th week of pregnancy, and congratulations! The baby moves further into the pelvis. It is considered to be ‘at-term’ and can actually arrive any day now. Make sure you are ready for the arrival of a new family member.

Week 38

At 38 weeks pregnant, your baby is the size of Swiss chard.

At 38 weeks pregnant, you can find yourself spending the whole life peeing. The pressure on your bladder is tremendous. Your baby is a fully functioning little human and your placenta is fully grown.

Week 39

At 39 weeks pregnant, your baby is the size of a small watermelon.

Welcome to the week 39 of pregnancy! Your baby is full term, meaning that it is fully developed and is only waiting for the right time to make an entrance into the world. Have you prepared everything that is needed to welcome your baby?

Week 40

At 40 weeks pregnant, your baby is the size of a mini watermelon.

At 40 weeks pregnant, you may feel disappointed that your due date has come and gone. Don’t panic and make the last preparations for a new human who’ll soon join the world.

Week 41

At 41 weeks pregnant, your baby is the size of a pumpkin.

At week 41 of pregnancy, you might be dying out of the desire to give birth and see your baby. But rest assured that plenty of moms-to-be go past their due date and everything turns out just fine.

Week 42

At 42 weeks pregnant, your baby is the size of a watermelon.

When a pregnancy lasts for 42 weeks or more it is referred to as a post-term pregnancy. While not many studies exist that prove why some women’s pregnancy lasts for 42 weeks, medical experts believe that factors such as hormones, genetics, and even obesity can be the cause.

Barbara Levy, MD

Former Vice President in Health Policy of the American College of Obstetricians and Gynecologists National Leadership Institute, CA, USA

If you’ve taken a pregnancy test and it appears to be positive, you might be wondering what happens next. That’s where our due date calculator or due date predictor comes in.

By using some basic information about your last period and cycle length, our pregnancy calculator can help you work out your estimated due date (EDD — aka when you might meet your baby). This information is also useful if you’re thinking about the baby’s due date timings before you start trying to conceive.

Try using our EDD calculator now and then scroll down for more on how due dates (and pregnancy) are calculated, plus information on when you could have conceived and how far along you might be.

Note:

If you’ve already had your first ultrasound scan, you can use our Due Date by Ultrasound Calculator instead.
Or, if you have conceived through in vitro fertilization (IVF), you can use our IVF and FET Due Date Calculator.

How far along am I?

One of the first questions you’ll probably have after discovering that you’re pregnant is “How pregnant am I?” Interestingly, there are two ways to measure the age of a baby during pregnancy — gestational age vs fetal age — but health care providers generally use gestational age only because it’s deemed more accurate.

More on those below, but when you know how far into your pregnancy you are, you can get a clearer idea of your expected date of delivery. This is another name for a due date, meaning your EDD is the approximate date when labor is expected to begin. As we’ll explain if you scroll down, this date is really just an estimate, so you can expect to go into labor anytime in the two weeks before and after your due date.

How far along am I? Gestational age

To track pregnancy and calculate a due date, doctors use gestational age. Gestation is how long a person is pregnant in weeks, and gestational age is measured from the last menstrual period (LMP) — the first day of your last period — to the current date in weeks.

In general, pregnancies last anywhere from 38 to 42 weeks (or around 280 days). If a baby is born before 37 weeks, they are considered premature.

How far along am I? Fetal age

The other method of measurement is fetal age. While gestational age measures how far along a pregnancy is in weeks, fetal age is the actual age of the growing baby. To calculate this, you work out the amount of time from the date of conception (which is around two weeks later than your LMP in a 28-day cycle but varies depending on cycle length) to the current date in weeks. However, this is a far less common measurement for pregnancy because it’s often hard to pinpoint exactly when you ovulated (and therefore the moment of conception).

How is due date calculated?

Lots of us assume that a pregnancy is exactly nine months long, but that’s not the case. To work out how to calculate pregnancy weeks, there’s a little more to it.

“The nine months of a pregnancy are actually 40 weeks,” Dr. Charlsie Celestine, Flo board member, obstetrician, and gynecologist (OB-GYN), explains. “The due date is 40 weeks from the first day of your last menstrual period. But some women can go beyond that to 41 weeks. ”

In fact, the first thing you’ll likely notice when you let your health care provider know you are pregnant is that pregnancy is calculated in weeks rather than months. And your baby’s estimated due date falls on the 40th week, when you’ll actually be around 10 months pregnant.

That’s to account for the fact that pregnancy is measured according to gestational age, not fetal age. So that means you count pregnancy from your LMP, not the date you conceived, adding an extra two weeks even though you weren’t technically pregnant then. Also, this method recognizes that not all months have the same number of days, so you’ll likely still be pregnant at nine months.

You might also see figures like 13/5 or 13+5 in your doctor notes. Pregnancy is counted in complete weeks, so 13/5, 13+5, or a variation of this would mean you’re 13 weeks and 5 days pregnant. Learn more about how you count pregnancy weeks here.

Your health care provider will usually calculate your due date based on one or a combination of the following methods, so let’s find out more about how they work.

How to calculate due date: Naegele’s rule

As we now know, the most commonly used method to calculate due date is to count “40 weeks from the first day of your LMP,” Dr. Celestine says, adding that this is usually done at your first appointment.

This method is also known as Naegele’s rule. “You calculate [EDD] using the first day of the last menstrual period [adding exactly one year to it], add seven days to that, and then subtract three months,” she explains.

It’s worth noting that this rule considers a regular menstrual cycle to be 28 days long, but it’s totally normal for a person’s cycle to vary from anywhere between 21 and 45 days. If your cycle lasts longer, the estimated due date will likely be later. If you have a shorter cycle, your due date may be earlier.

How to calculate due date: Period wheel

“More commonly, I use a pregnancy wheel using the first day of the menses [period],” says Dr. Celestine, explaining how she tends to work out the due date in her patients.

A pregnancy wheel or gestation calculator is a simple calendar that works out your EDD or baby’s birth date based on different inputs, such as your LMP. OB-GYNs can also use a pregnancy wheel as a pregnancy timeline calculator to work out when you’ll have certain scans and screenings, along with your trimester dates.

How to calculate due date: Ultrasound scan

As you’ve seen above, there are numerous ways to calculate an estimated due date — most involving the date your last period started. But an ultrasound scan in the first trimester is used to check that the dating based on the last menstrual period is correct. This is especially important if your period doesn’t always arrive at the same time each month.

“The LMP is compared to an ultrasound because some women have irregular cycles [and some can’t remember when their last period happened], so their LMP is not the most accurate,” Dr. Celestine explains.

“On ultrasound, I would measure the length of the fetus, called the ‘crown–rump length,’ in the first trimester to get the gestational age or due date. I then compare that date to the result I would get from just using the LMP.

“If the two dates are within five days of each other, and the pregnancy is less than nine weeks along, then we use the due date calculated by the period, not the ultrasound. But for a greater-than-five-day difference, we use the ultrasound.”

Already had your first ultrasound scan? Then you can use our Due Date by Ultrasound Calculator.

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Find out what you can do with our Health Assistant

While most OB-GYNs use a combination of Naegele’s rule and the pregnancy wheel to determine EDD — and then use an ultrasound to confirm it — there are some other theories and methods about how to calculate due date. However, it’s worth noting that none of the following are currently used by health care providers to work out the due date, as there’s a lack of scientific evidence behind them. The theories are as follows:

How to calculate due date: Mittendorf-Williams rule

One theory on how to calculate due date, also using LMP, is the Mittendorf-Williams rule. This is based on an old study from 1990, and there haven’t been any more recent studies to suggest it’s accurate, which is why health care professionals don’t commonly use it to predict EDD.

This rule is based on a decades-old study that showed that first pregnancies tend to be slightly longer (an average of 288 days from LMP), and for subsequent pregnancies, the delivery date is an average of 283 days from LMP. So …

First, determine the first day of your last menstrual period.
Next, count back three calendar months from that date.
Lastly, add 15 days to that date if it’s your first pregnancy or 10 days if it’s not your first pregnancy.

How to calculate due date: Parikh’s rule

Parikh’s rule is another theory that lacks scientific evidence to back it up, so medical practitioners don’t commonly use it to calculate due date either. The idea goes, however, that it can help predict due date in those who have irregular cycles. So, how does it work?

Loosely designed around Naegele’s rule, the expected date of delivery in Parikh’s rule is calculated by adding nine months to the date of your last menstrual period, subtracting 21 days, and then adding the duration of previous cycles. In short, use this formula:

LMP + 280 days – 21 days + the average length of previous cycles

How to calculate due date: Wood’s rule

Wood’s method considers the individual length of the menstrual cycle, as well as the number of pregnancies a person has experienced. However, there is also minimal research on this and its effectiveness. To work it out …

First, you calculate your expected due date. Do this using the following formulas.
- For first pregnancies: LMP + 12 months – (2 months and 14 days) = EDD
- For subsequent pregnancies: LMP + 12 months – (2 months and 18 days) = EDD
Then, you use the expected due date in the equations below.
- For cycles longer than 28 days: EDD + (actual length of cycle – 28 days) = EDD
- For cycles shorter than 28 days: EDD – (28 days – actual length of cycle) = EDD

How to calculate due date: Conception date

If your cycle runs like clockwork, and you were having sex to get pregnant at a specific time, then you might have an inkling that conception happened on a certain date. But Dr. Celestine says that the conception date “isn’t used medically to calculate due date” because it’s often not accurate.

That makes sense because we know sperm can live in the female body for up to five days, an egg can still be fertilized for up to 24 hours after its release from the ovary, and ovulation doesn’t always happen on the same day each month (you can find out when you’re likely to be ovulating each month using our online ovulation calculator). That means you can still get pregnant several days after you’ve had unprotected sex.

How to calculate due date if you’ve had IVF

If you’ve had IVF, then your baby’s due date is calculated slightly differently, depending on:

Whether you had a fresh or frozen embryo transfer
If you had a frozen transfer, the age of the embryo when it was frozen. For example, if it was frozen on day three, then you will be two weeks and three days pregnant on the date of transfer. For embryos frozen on day five, it’s two weeks and five days pregnant on the date of transfer. Your clinic will be able to explain more.

The good news is that IVF due dates are generally more accurate because you’ll know exactly when you had your embryo transfer or medically conceived, although no due date is 100% accurate. Use our IVF Due Date Calculator to work out when you could be due.

How accurate is due date?

There’s a lot that centers around it, so you’re probably wondering how likely it is that you’ll give birth on your due date. “The accuracy of the due date depends on how early in the pregnancy it was calculated and how predictable your menstrual cycle is,” Dr. Celestine explains.

“The earlier you see an OB-GYN to establish care for the pregnancy, the better, because the due date [from an ultrasound scan] is more accurate early in pregnancy compared to later. It’s rare for a baby to be born exactly on their due date [only around 4% of babies are]. Usually, delivery happens within a week before or after. But there are many babies also born prematurely, [along with] medical reasons why you might need to be induced for labor early, so it really depends on the individual.”

What day did I get pregnant?

As Dr. Celestine explains, it’s hard to predict the exact day you got pregnant (unless you’ve successfully conceived after fertility treatment).

“It’s all an estimate because it depends on the day you ovulated,” she says. “If you know your cycle length and it’s always the same, then usually midway through your cycle prior to pregnancy is when conception occurred. ”

Can my due date change?

Lots of people will calculate their due date as one of the first things they do after finding out they’re pregnant. And that’s useful for having a rough idea of when your baby will arrive, but it’s worth noting that this should be confirmed by your health care provider. They will use information about your last menstrual period, plus your first ultrasound, to work out your EDD, and once this has been calculated, it’s rare for your due date to change.

It’s so unusual for the due date to change after your first ultrasound scan because knowing the gestational age holds a lot of importance in monitoring the health of a pregnancy. “There are certain tests that need to be performed at certain gestational ages during a pregnancy,” Dr. Celestine explains. “Knowing how far along you are is also important for following the growth of the baby, when we can expect to deliver, and much, much more.”

Can I plan my due date?

Some people like to be organized, and there’s nothing wrong with that. But it can be quite tricky to plan a due date because there are so many factors at play with conception that you (and your partner) don’t have control over.

Nobody ever knows for certain when they will conceive. Even if you pinpoint your fertile window and have plenty of unprotected sex during that time, you still won’t know for certain whether or not that will be the month you get pregnant. That’s because so much of it is up to chance. For context, 45% of young couples (under 35) will conceive after three cycles, and 65% will get pregnant after six cycles. So while you might want to plan to have a baby in a certain month, all you can really do is try.

And even if you do manage to conceive at a time that gives you your ideal due date, remember that your EDD is just an estimate. Babies come on their own schedule. While the “average” pregnancy lasts 40 weeks from the day of the last menstrual period, it is normal for babies to come anywhere from 37 to 42 weeks, so it’s best not to focus too much on a specific due date.

Due date tracking with Flo

Whether you’re currently pregnant or trying to work out when you’d be due if you got pregnant today, Flo can help. Use our Trying to Conceive mode to optimize your chances of getting pregnant by tracking your periods, which can help to identify your most fertile days. Alternatively, switch to Pregnancy Mode to get week-by-week updates for both your body and your baby.

Try some of Flo's other online tools, including our hCG calculator, our pregnancy test calculator, and our period calculator.

References

“Extremely Preterm Birth.” The American College of Obstetricians and Gynecologists, www.acog.org/womens-health/faqs/extremely-preterm-birth. Accessed 30 Aug. 2022.

“Heavy and Abnormal Periods.” The American College of Obstetricians and Gynecologists, www.acog.org/womens-health/faqs/heavy-and-abnormal-periods. Accessed 30 Aug. 2022.

“How Long Does Pregnancy Last?” The American College of Obstetricians and Gynecologists, www.acog.org/womens-health/experts-and-stories/ask-acog/how-long-does-pregnancy-last. Accessed 13 July 2022.

Jukic, A. M., et al. “Length of Human Pregnancy and Contributors to Its Natural Variation.” Human Reproduction, vol. 28, no. 10, Oct. 2013, pp. 2848–55.

Khedri, Parichehr, et al. “Comparison of the First Trimester Ultrasound and Parikh’s Formula in Determining the Expected Date of Delivery: A Prospective Study.” BMC Pregnancy and Childbirth, vol. 21, 30. Apr. 2021, jbrms.medilam.ac.ir/article-1-152-en.pdf.

Mittendorf, R., et al. “Predictors of Human Gestational Length.” American Journal of Obstetrics and Gynecology, vol. 168, no. 2, Feb. 1993, pp. 480–84.

Morgan, John A., and Danielle B. Cooper. “Pregnancy Dating.” StatPearls, StatPearls Publishing, 2021.

“Screening Tests in Pregnancy.” NHS, www.nhs.uk/pregnancy/your-pregnancy-care/screening-tests/. Accessed 13 July 2022.

Operational tracking of postal items - My Parcel service

Up-to-date information on the location of parcels of more than 100 Russian and international postal and courier services

Tracking

Free automatic tracking of the first 50 track numbers every month.

Notification

Free notifications to multiple email addresses and VKontakte messages.

Interface

Adaptive and customizable interface for displaying the list of monitored track numbers.

API & webhook

API service interaction and webhook function for real-time alerts.

Tracking parcels by track number

The My Parcel service offers prompt tracking of postal items by track number more than 100 Russian and international postal and courier services. All information about the movement of the parcel is taken from open sources, using the official websites of postal services. "My Parcel" can quickly track almost all shipments from China. After registering on the site is available the function of saving each track number for automatic tracking and free email alerts mail about all the movements of each parcel.

Chatbot

Introducing our chatbots in Telegram messenger and VKontakte social network. All bots can track track numbers around the world in messages. And after registration, the function of notifications about new shipment statuses in the form of chat messages from our group is available. Telegram

VKontakte

What is a track number?

Track number - the identifier of the postal item assigned by the postal or courier service for the purpose fixing movements from the sender to delivery to the recipient. As a rule, the track number consists of numbers or combinations of Latin letters and numbers and has a specific pattern by which you can identify the service delivery. If you place an order in an online store with delivery, then you should take into account the order number in store is not the track number of the parcel. They are different identifiers. The seller in this case must indicate both the order number and the track number of the parcel.

Parcel route

Each parcel starts its journey from the post office, where it is received from the sender, register, assign a track number and send to the recipient. During the delivery process, the parcel passes several sorting points, where a further optimal delivery route is determined for it. Rarely there are cases when a parcel is mistakenly sent in the wrong direction, in which case in the next sorting point will be resent, the parcel will be redirected in the right direction.

Cashback for purchases

Get cashback with the LetyShops service, shopping in stores all over the world. Increased cashback is available for purchases on Chinese Internet sites AliExpress, Gearbest or Bang good.

Why is it taking so long?

Delivery deadlines for all shipments are set by postal or courier services in depending on the distance between the receiving points and the destination address. Delivery times may be extended at times of peak loads, during holidays, when the number of parcels increases many times. Worth it too pay attention to the fact that parcels are never sent immediately to their destination. At passing through different sorting points, they are waiting for consolidation with other parcels that follow in the same direction. The waiting time can be up to several days. Until the next shipment point, all parcels are in stock and are waiting for a full batch to be sent to the next paragraph.

Information about statuses

mode in your own information system. The date and time of the corresponding event is always recorded. For international parcels, statuses are fixed both on the side of the sender's country and on the side of the country recipient. There is an exchange of relevant information between postal services. Sometimes some mailing statuses are fixed with a delay. Part of the parcels with a simplified delivery system (as as a rule, these are parcels with economy delivery) are not tracked, only the status of arrival at the place for delivery.

Export and import

For international parcels, the export operation is often the longest in the process tracking. First, the parcel goes through customs clearance in the sender's country, then in the transit zone awaiting shipment by air shipment to the country of destination. Waiting is due to the fact that the collection process is in progress the required number of parcels to send on one flight. A large batch of several tons is assembled and leaves on one flight. The waiting process can take up to 2-4 (!) weeks. After the departure of the flight and arrival in the country of destination, import and further customs clearance takes place. Here the expectation can be due to the workload of the customs service.

Who delivers the packages?

Delivery of parcels, including international ones, is usually carried out by state postal services, depending on whose territory it is located. The postal service is responsible for receiving, transportation, storage and delivery of the parcel. Parcels for delivery arrive at the nearest post office at the place of residence. When ordering in online stores with delivery, the seller can send the parcel courier service. In this case, the parcel can be delivered immediately to the door, or to the point of issue.

GLS Tracking | GLS Tracking Parcel & Cargo Delivery

General Logistics System, also known as GLS, is a logistics company based in Amsterdam, the Netherlands. GLS is committed to a successful and sustainable commercial business while protecting the environment for future generations. They also strive to contribute to society.

Tracking your GLS package is easy with Ship24. To track your packages, simply enter your GLS tracking numbers on the Ship24 homepage and get notifications and statuses regarding their location. Track up to 10 GLS parcels at the same time and get results in no time.

How can I track my GLS order?

To start tracking a GLS package or package, you need to obtain a GLS tracking number. This will usually be in the form of a 9 digit numeric tracking code that will be generated to identify your package once GLS has received it. However, in some cases the tracking number will be in 11-, 12-, 13-, or 14-digit format.

This tracking number or code will help you get all the information you need about your GLS order, such as the estimated delivery day, as well as current tracking information as your package makes its way to its final destination, and status updates when it reaches a certain checkpoints.

The tracking number attached to your GLS package will be scanned every step of the way by a processor that will update the location and status of your package. Your package will have a tracking number in the form of a unique barcoded label. This information is then made available to anyone with a tracking number.

Where can I find my GLS tracking number?

If you are shipping a package, you can find the GLS tracking number on the package itself or on the receipt issued to you. GLS tracking number format may vary, numbers may consist of 9-14 digits. In some cases where you can't find the tracking number, you can check the email address you provided and you should be able to find the GLS tracking number there.

If you are a recipient, you can request a GLS tracking number from the sender. In this case, you will be able to track where your package is.

Ship24 is one of the best and most reliable to keep you up to date on the status of your packages. You can track up to 10 parcels at the same time and get results within seconds. Just enter the tracking number on the main page and you will be able to see the progress of your package.

What is the GLS tracking number format?

GLS tracking numbers consist of numbers and letters. The tracking number format for the GLS is usually a combination of 8 digits, but in some cases it can be 20 digits long.

GLS Tracking Number Format Examples

00FYU360
00MLFYBY

What does the status of my GLS package mean?

As your GLS package travels to its final destination, it will undergo a series of package status and location updates.

GLS Tracking Notifications

Some or similar are listed below to help senders better understand their GLS package tracking updates.

Tracking notices	Description
The parcel has reached the parcel center.	The parcel is in the parcel center.
The parcel data was entered into the GLS IT system; the parcel was not yet handed over to GLS.	The sender has registered a tracking number in the GLS system, but has not yet handed over the package.
The parcel was handed over to GLS.	GLS has a package.
The parcel is expected to be delivered during the day.	Parcel will be delivered today.
The parcel has been delivered.	The recipient has taken the parcel.
The parcel has left the parcel center.	The parcel has left the GLS warehouse.
The parcel is stored in the parcel center.	The parcel is stored in the GLS warehouse.
The parcel has reached the parcel center and was sorted manually.	The parcel is in the GLS warehouse and is being sorted.
The parcel has been delivered at the ParcelShop (see ParcelShop information).	Parcel reached ParcelShop.
The parcel has been delivered / dropped off.	Parcel was left at the delivery address.
The parcel was provided by the sender for collection by GLS.	Parcel was sent by sender for GLS.
The parcel has reached the ParcelShop.	Parcel is in ParcelShop.
The parcel is stored in the parcel center to be delivered at a new delivery date.	The parcel is stored in the parcel center for delivery on another day.
The parcel could not be delivered as the consignee was absent.	The package was not delivered because the recipient is not available.
The parcel has been picked up by GLS.	GLS has a package.
The parcel could not be delivered as further address information is needed.	The package was not delivered due to the lack of information about the delivery address.

What GLS package tracking options do I have?

Luckily, tracking a GLS package is a simple process with two options available. First, you can go to the GLS website with your tracking number and start tracking your package from there. Secondly, you can use Ship24, a site built specifically for tracking GLS packages, as well as packages with hundreds of other couriers.

GLS tracking is available on its website, which can be useful for one-time or infrequent buyers who only ship orders with GLS and want to track a single parcel or package. To track with GLS only, after the customer has purchased the GLS parcel delivery service and GLS has received the parcel, they can go to the GLS website to start tracking their GLS parcel.

However, buyers should be aware that there are a number of disadvantages that may arise if a buyer chooses GLS tracking, for example:

more than one courier or courier that is present in that country, not just GLS. In this case, you will need a tracking tool that can track multiple carriers and GLS, which is possible with Ship24.
Different ways of transporting a package may mean that you need a different handler, for example if the package needs to be delivered within a day or two and to a remote destination. Therefore, you may need to select a courier who can deliver within that time frame or to a destination that will not always be GLS.
GLS occasionally subcontracts shipments to certain regions with other processors. This may mean that the GLS website does not have the most up-to-date information about your parcel or parcel as it may be being processed under a slightly different tracking number or different system. Ship24 tracks hundreds of different couriers and scans them all to find the latest information on your GLS package. This is a comprehensive tracking tool that ensures that if your package changes hands or is handled by someone else, Ship24 will be the best choice to keep you informed.

Where can I track my international GLS package?

GLS covers 41 European countries including the UK, Belgium, Ireland, Germany and the Netherlands. In order to track your GLS international package, you will need to copy your tracking number and paste it into either the GLS tracking website or the Ship24 universal tracking system.

With Ship24 you can track up to 10 packages at the same time and get results within seconds. Ship24 guarantees that you will be at every step of the way of your package, and if you create an account, you will be able to save your package and be notified every time it moves.

Is Ship24 tracking better than GLS tracking?

The difference between GLS and ship24 is that while the former can only offer GLS package tracking through its website, Ship24's universal tracking site provides users with powerful multi-courier tracking for any package worldwide.

Ship24 works with over 1200 couriers and thousands of online stores, giving it the ability to track packages delivered by multiple couriers around the world.

With Ship24's global tracking capability at the people's fingertips, buyers no longer have to track their packages on different websites depending on who handles their package, which can sometimes be a difficult process to find the right site to enter their tracking number. Now buyers and sellers can track all their shipments in one place!

Whether with GLS or any of its competitors such as FedEx, USPS, UPS or China Post, among others, can find all their tracking needs on Ship24.

Simply go to the Ship24 website and enter your tracking number to start universal tracking of your package from any of the couriers listed above and many, many more. The service is fast, free and efficient, and you can search for your package as many times as you like, 24 hours a day, 7 days a week!

How long does it take to deliver the GLS?

Standard GLS shipping typically takes less than 24 hours to reach your final destination depending on your location, and domestic shipments even ship the same day in some countries such as Ireland.

Delivery of UK GLS packages to the UK is usually completed in about 24 hours, but in some cases can take up to 48 hours.
Delivery within Europe and the United States or from the USA using GLS International will take 24 to 96 hours to arrive at the destination . GLS delivers parcels Monday to Friday during business hours.

Shipping to the US usually takes longer than shipping to Europe. GLS currently offers shipping to select US states. To check if GLS is delivering to your desired destination, contact GLS directly on their website to make sure your package can be delivered to your desired destination.

The GLS express option is more expensive, but it means your package will be delivered within 24 hours. If the package is not delivered within this time, the sender is entitled to a full refund, depending on the circumstances of the delay.

Does GLS deliver on weekends?

While GLS starts delivering its packages between 8:00 am and 10:00 am on weekdays, the company sends express packages on Saturdays. To find out if your GLS express package is on its way to your doorstep, simply copy the GLS tracking number on the homepage and get real-time updates on the current status of your packages.

What is the shipping cost for the GLS?

GLS shipping costs depend on your shipping requirements. GLS will take into account the size and weight of your package and you will need to decide which service (standard or express) to use to determine the shipping price.

Please note that the location of your package's final destination may also sometimes change shipping costs depending on the region or area. This must be confirmed by GLS after you have entered all the required information regarding your shipping requirements.

There are four eurozones in the GLS delivery system, from Euro I to Euro IV, the cheapest being Euro I and the most expensive being Euro IV. To find out which countries are part of the euro area, visit the official GLS website.

Does GLS deliver in the UK?

Yes! GLS delivers within the UK with average delivery times ranging from the same day to 48 hours, depending on the size, weight and destination of your package. Parcels destined for Ireland, which is not part of the UK, may have longer delivery times, which should be taken into account by senders.

GLS is also available in 41 European countries and some US states. Contact GLS for their international shipping options.

How can I contact GLS?

If you have questions about how GLS works, their pricing, GLS package tracking or a specific package, you can call them directly on: 018606200. They will be able to answer all your questions if contacted during business hours Monday through Friday.

Please note that if you are calling from outside the UK, you will need to add an international code to this number in order to get through. Please also note that time frames may vary across Europe, which may affect your ability to call during their business hours.

You can also fill out a short form on the contact page of the GLS website and customer service will be able to respond to your GLS request as soon as possible.

When will I receive GLS package tracking updates?

Events such as the following list will be notified to you via your Ship24 tracking number.

GLS tracking updates

When your GLS package is handed over to the carrier.
When your GLS package was shipped or left the country of origin.
When your GLS package has reached the country of destination and is being cleared by customs.
When your GLS package has reached the country of destination.
When your GLS package is under a different transit period. It may be located in another country as a transit point and from there it will be sent to the final country of destination.
When your GLS package arrived at the facility.
When your GLS package is accepted by the carrier.
When your GLS package is waiting to be received.
When your GLS package was returned to sender.
When an attempt was made to deliver your GLS package.
When your GLS package is held by customs.

There will be many other occasions when you will receive tracking updates on your GLS packages, be sure to contact Ship24 for the latest on its status and location.

Ship24's auto-discovery system means that any courier handling your package will be recognized as soon as you enter the tracking number on the Ship24 website. This means that if you want to track your package, you don't have to deal with extensive drop-down menus to select your courier or manually enter information to help the system find it. Just enter your tracking number on the Ship24 website and let the powerful all-in-one tracking tool do the rest.

Ship24 offers true end-to-end tracking and multi-tracking capability with up to 1200 couriers meaning it's a turnkey solution for all your tracking needs.

Ship24 tracking is second to none for superior functionality and we keep our users informed of their GLS packages for free 24 hours a day, 7 days a week!

My GLS package was damaged, what should I do?

If the GLS package arrives damaged, the sender will be at fault, as he must pack the goods correctly. If any GLS package has any external damage, the recipient may refuse to receive the package at the pickup point. In this case, GLS will return the parcel to the warehouse and inform the sender of the complaint.

If recipients accept a package only to later discover that it is damaged, or discover that the item inside is damaged upon opening, they should take their complaint directly to the sender. GLS cannot verify the contents of any packages sent and only deals with delivery, so the sender is responsible. With Ship24 you can know the exact location of your package as well as real-time status updates delivered by GLS.

How often is the GLS tracking updated?

While some tracking tools may vary in response time, Ship24 offers as close to real-time updates as possible on the location and status of your GLS package.

While the processor is responsible for scanning the tracking barcode on your package to update the movement of your packages, once this information is available, it will immediately be available on the Ship24 website.

Why is my GLS tracking not updating?

Sometimes the tracking information is not updated immediately due to the processing of your package. It may take some time before the tracking system receives information about your package. In this case, wait a few hours, or at least 24 hours, before trying to track again.

Watch out for any misspelling of a letter or number in your tracking number, this can sometimes happen too. If there are still no tracking updates after a few days, your best bet is to contact the sender or contact your nearest GLS post office so they can help resolve the issue.