How many weeks am i if my due date is
Pregnancy Due Date Calculator | BabyCenter
Calculation method
When did your last period start?
When did your last period start?mm-dd-yyyy
Cycle length
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 her 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
BabyCenter Staff
Content that appears under this byline was created by members of the BabyCenter Editorial team.
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Highlights this week
Taking a pregnancy test
By the end of this week, you may be able to get a positive pregnancy test.
Pregnancy tests work by detecting the presence of a hormone called human chorionic gonadotropin (hCG) in your urine. Some home pregnancy tests claim to detect pregnancy as early as five days before you miss your period, but it's best to wait until the first day of your missed period for accurate results. If you test too soon, you may get a false negative pregnancy test or an unclear result like a faint line.
Implantation
Your developing blastocyst has travelled down the fallopian tube and is starting to implant itself in the lining of your uterus. At this time, 15 to 25 percent of women experience implantation bleeding, which is a light bleeding that happens about six to 12 days after conception. You may feel implantation cramps as well.
Early pregnancy symptoms
Most women don't feel anything until they've missed a period, but you may notice bloating, cramping, or spotting this week. Your breasts may also be more tender than usual and you may have a heightened sense of smell, one of the earliest pregnancy symptoms.
So if your partner, your house, or your dog suddenly smells different to you, thank your surging hormones.
Baby development at 3 weeks
Cells are multiplying
Your developing baby is a tiny ball of several hundred cells that are multiplying and burrowing into the lining of your uterus. The cells in the middle will become the embryo. The cells on the outside will become the placenta, the pancake-shaped organ that delivers oxygen and nutrients to your baby and carries away waste.
Connecting to you
Your baby-to-be is receiving oxygen and nutrients (and discarding waste) through a primitive circulation system made up of microscopic tunnels that connect to the blood vessels in your uterine wall. The placenta will eventually take over this task around the end of the first trimester.
Your baby at 3 weeks
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Implantation
3 weeks pregnant body
Early pregnancy hormones
The cells that will become the placenta are pumping out the pregnancy hormone hCG.
It tells your ovaries to stop releasing eggs and keep producing progesterone, which prevents your uterus from shedding its lining – and its tiny passenger. Once there's enough hCG in your urine, you'll get a positive pregnancy test result.
Amniotic fluid
Amniotic fluid is beginning to collect within the amniotic sac. This fluid will cushion your baby in the weeks and months ahead, and it's what may eventually come gushing out of you if your water breaks before or during labor.
Pregnancy symptoms during week 3
No pregnancy symptoms?
Some women feel pregnant even before the test is positive, but most don't. If you have pregnancy symptoms this week, they may feel like PMS. But don't worry if you haven't felt anything different yet. Even at 5 weeks pregnant, only half of women feel pregnancy symptoms.
Gas and bloating
The hormone progesterone relaxes muscles throughout your body, including in your digestive tract. These relaxed muscles slow down your digestion, which can lead to gas and bloating and create uncomfortable sensations in your gut.
About half of pregnant women experience constipation at some point during their pregnancy. To keep things moving, stay hydrated and eat high-fiber foods like whole grains, fruits, and vegetables.
Sore breasts
Some women say their sore breasts in early pregnancy are like an exaggerated version of how they feel before a period. Your breasts may feel swollen, tender, or tingly – and your nipples may be extra sensitive and uncomfortable. Later in pregnancy, you may notice your nipples getting darker.
Spotting
You may have a bit of light bleeding (spotting) this week. This is implantation bleeding – it can happen around the time the fertilized egg implants in your uterus. It's a lot lighter than a typical period, and only lasts for one to three days. (If you have pain along with bleeding, call your healthcare provider immediately. This can be a sign of an ectopic pregnancy.)
Basal body temperature stays high
If you're charting your temperature, it should stay elevated this week.
To keep track, use a basal body thermometer and take your temperature after you wake up in the morning, before you get out of bed.
Your body at 3 weeks
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Pregnancy checklist at 3 weeks pregnant
Pay attention to your emotions
When you're waiting to learn whether you're pregnant or not, or just finding out, it's normal to be anxious. If you're feeling stressed or worried, talk to your partner or a trusted friend. Or, try writing down everything that's bothering you. Journaling can improve your emotional well-being, mental clarity, and even physical health.
Avoid overheating
Hot baths are okay during pregnancy as long as they aren't too hot. But avoid steam baths, hot tubs, and saunas. Elevated body temperature, especially early in pregnancy, has been associated with an increased risk of neural tube defects in babies.
Eat nutritious meals and snacks
Eat pregnancy-friendly foods such as fruits and vegetables, low-mercury fish, and whole grains.
Choose foods containing vitamin C (like strawberries, citrus fruits, bell peppers, and tomatoes), iron (like beef, poultry, soy products, and spinach), and calcium (like Greek yogurt, fortified cereal, and pasteurized cheese). For snack ideas, check out 10 of our favorite healthy snacks for expecting moms.
Cut down on coffee
While you're trying to conceive and once you get pregnant, experts recommend limiting caffeine to about one cup of coffee a day. It's important to watch your caffeine intake because having too much can affect your pregnancy and your baby. See how much caffeine is in different foods and drinks so you can stay under the recommended daily limit.
Get help quitting
If you need help quitting smoking, drinking, or taking drugs, talk to your healthcare provider and ask for a referral to a program or counselor.
Improve your sleep
When pregnancy-related sleep problems hit in a few months, be ready for them. Create better habits around sleep and work on good sleep practices like establishing a regular bedtime routine and making your bedroom a sleep sanctuary.
Make sure your work and home are safe
Some jobs can be hazardous to you and your baby. If you're routinely exposed to chemicals, loud noises, or radiation at work, or if you have to be on your feet constantly or lift heavy objects, talk to your provider about how to stay safe while working during pregnancy. Also, keep in mind that some things in your home may be dangerous for your developing baby. Lead (in drinking water from old pipes), mercury (in certain fish), certain pesticides and fertilizers, and cat litter containing feces are all potentially harmful.
Kate Marple
Kate Marple is a writer and editor who specializes in health, pregnancy, and parenting content. She's passionate about translating complicated medical information into helpful pregnancy and parenting advice that's easy to understand. She lives in San Francisco with her family.
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2 weeks 4 weeks
How to correctly calculate the gestational age and determine the date of delivery
It often comes as a surprise to first-time pregnant women that in obstetrics the gestational age is determined not in months, but in weeks.
But the surprises do not end there - the fact is that the obstetric period is calculated not from conception, but from the first day of the last menstruation.
In fact, pregnancy occurs two weeks after the start of the obstetric period, at the time of ovulation, when the sperm meets the egg. Thus, the age of the embryo, or gestational age, differs from the obstetric one by 2 weeks down.
How long does pregnancy last?
The obstetric term of a term pregnancy is 40 weeks, or 280 days. It is on the basis of the obstetric gestational age that the doctor will prescribe tests and examinations for you, determine the date of maternity leave and calculate the EDD (estimated date of birth).
Doctors use the Negele formula to calculate the EDD. According to this formula, if we add nine months and seven days to the first day of the last menstruation, we get the estimated date of birth.
Unfortunately, determining the gestational age from the first day of the last menstrual period is not a very accurate method.
It is well suited for women with a stable 28-day cycle, but if your cycle is slightly longer or shorter, then the date of ovulation shifts, respectively, and the actual obstetric gestational age will differ from the established one.
The most accurate way to calculate the EDD is to add 266 days to the date of the last ovulation (if you know it).
How to confirm pregnancy, determine the duration of pregnancy and the date of delivery
By itself, a delay in the start of a new menstrual cycle does not necessarily indicate pregnancy - failures can be explained by diseases, excessive physical exertion or stress. Pregnancy must be confirmed with an hCG test or examination on a gynecological chair. 1) Blood test for hCG cycle or the woman will feel the first symptoms. Also, an analysis of the level of hCG in the blood allows you to determine the gestational age with an accuracy of about two weeks.
2) Home pregnancy test
Home pregnancy tests also work by measuring hCG levels, but they are less sensitive than blood tests.
The most modern of them can not only confirm the presence of pregnancy a few days before the delay, but also indicate (not too accurately) an approximate date.
Tests of the old generation will show a more or less accurate result only after a delay, that is, after 2-4 weeks from conception.
3) Gynecological examination
A qualified gynecologist-obstetrician can diagnose pregnancy during an examination starting 3-4 weeks after conception, focusing on changes in the shape and size of the uterus, as well as other signs.
4) Ultrasound
Ultrasound is the most accurate way to diagnose pregnancy. With the help of ultrasound with a transvaginal sensor, it is possible to determine the presence of a fetal egg in the uterus already 1-2 weeks after conception (3-4 obstetric weeks), but fetal heartbeats can only be detected for a period of 5-6 obstetric weeks. It is possible to determine the gestational age with high accuracy (up to 2-3 days!) With the help of ultrasound only from 6-7 weeks.
If the delay, as well as the result of an hCG test or blood test, indicate that you will soon become a mother, do not rush to get an ultrasound right away. Wait another 2-3 weeks, then by ultrasound you will not only be accurately determined by the period, but will also be allowed to listen to the baby's heartbeat.
If you did not do an early ultrasound to confirm pregnancy, then for the first time you will encounter this study at the 10-14th week. At the same time, the exact gestational age and PDR will be established or corrected for you. During pregnancy, you will need to undergo such an examination at least twice more. This will happen at 20-24 and 30-34 weeks. However, it is worth saying that ultrasound in the 2nd and 3rd trimesters may have an error in determining the gestational age. The PDR established according to them may differ from the real one by 2-3 weeks. That is why it is so important not to miss the first screening and do an ultrasound on time.
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Pregnancy and coronavirus | Updated and verified information
At Hospital Sant Joan de Deu Barcelona employs a multidisciplinary team of obstetricians, gynecologists, pediatricians, anesthesiologists, midwives and nurses who update daily official guidance on the current SARS-CoV-2 coronavirus outbreak . The protocol of action and the scheme were created to protect the health of pregnant women , as well as our specialists.
We can provide proper care and safety for pregnant women follow-up in our hospital, both healthy and those who develop symptoms within the next few days or if the pregnant woman has been infected and falls ill coronavirus COVID-19 .
Below we have collected the main doubts and concerns that, in our opinion, may arise in pregnant women who fear for their health due to the coronavirus.
If I am pregnant, am I more at risk than the general population?
Data published up to December 2021 indicate that pregnancy is a risk factor for maternal complications due to COVID-19 infection compared with non-pregnant women under the same conditions. However, the absolute risk is small. Consequences such as an increase in the number of abortions, obstetric complications or fetal malformations due to coronavirus have not been registered.
What happens if I get COVID-19 while pregnant?
Every day we have more and more information about the impact of COVID-19 on pregnant women, the information is updated. So far, the evidence suggests that there is no increased risk of abortion in pregnant women with COVID-19 .
Scientific studies available to date have reported some cases of possible intrauterine or perinatal transmission , but this is very rare and it does not appear that infection with COVID-19 can cause fetal malformations. The few known cases in infants who contract coronavirus infection in the early days are mild. We don't have any serious cases.
In terms of maternal complications, most complicated pneumonias occurred in unvaccinated pregnant women who were in the third trimester of pregnancy or in the postpartum period, that is, a few weeks after giving birth. Infection with COVID-19 during the first and second trimesters of pregnancy is associated with few complications. However, due to complications in the mother (especially in the third trimester of pregnancy), the frequency of births of premature babies increased.
At Hospital Sant Joan de Deu Barcelona we recommend starting treatment with heparin to avoid thrombus formation, the duration of treatment will vary.
depending on the severity of coronavirus infection and the duration of pregnancy.
Is the coronavirus vaccine recommended during pregnancy?
So far published vaccination studies in pregnant women have shown that vaccinations are safe for both mother and fetus . For this reason, the vaccine should be offered to pregnant women as well as to the general population, as its benefits outweigh the risk of exposure to COVID-19 infection . It is also recommended to offer vaccination to pregnant women with diseases associated with an increased risk of complications.
It is especially important to offer the coronavirus vaccine to pregnant women with conditions such as pregestational diabetes, heart disease, obesity, kidney disease, severe respiratory disease such as asthma or cystic fibrosis, high blood pressure, immunosuppression, etc., and pregnant women at high risk of contracting coronavirus.
The current recommendation is that mRNA vaccine (in which there is already sufficient experience) be offered to all pregnant women according to established vaccination plans. The ideal time for vaccination is the second trimester of pregnancy , but if there is a high epidemiological risk, the presence of other concomitant diseases or risk factors, it is also possible to prescribe vaccine and in the first trimester.
With respect to vaccination against COVID-19 during lactation no components of the vaccine have been identified in milk, but antibodies have been detected and scientific societies advocate vaccination against COVID-19 during lactation due to the likely additional benefit transfer of antibodies against coronavirus to an infant.
As with the rest of the population, it is recommended that pregnant women receive a booster dose 6 months after mRNA vaccine administration (Pfizer or Moderna) or after 3 months in case of Jansen or Astrazeneca initial vaccination.
How will my pregnancy control go now?
Sant Joan de Deu Hospital operates with updated and constantly revised protocols to ensure that uninfected pregnant patients, as well as patients infected with coronavirus are guaranteed to be as safe as possible. That's why it's important to trust the medical staff, follow their recommendations, and attend the pregnancy counseling to ensure the well-being of both you and your baby. If the visit can be done remotely (for example, to provide test results) or it can be postponed for a few days, the center will contact you to give you new instructions. Pregnant women infected with COVID-19 who are yet to give birth and have mild symptoms of infection are advised to use protective measures and follow current home isolation guidelines. The patient will be informed individually by our specialists. Obstetrical supervision, if possible and on a case-by-case basis, will be delayed by 7 days to avoid contact with other pregnant women or vulnerable patients as much as possible.
If it is not possible to postpone obstetrical control, it will be carried out in outpatient consultations in the late morning.
Do I need to go to the Emergency Department if I have symptoms consistent with COVID-19 infection?
Pregnant women are considered a vulnerable population to infection with COVID-19, and for this reason, if you have fever, cough, general malaise or diarrhea you should contact your primary health care center or hospital to confirm infection by performing PCR or antigen 9 test0136 depending on the number of days when the first symptoms appeared. Be aware that for mild cases not requiring hospitalization, protective measures (mask, frequent hand hygiene) and avoidance of contact with vulnerable people are recommended.
If you have a fever above 38ºC that does not go down with paracetamol, or if you feel short of breath, you should contact the Emergency Department to complete the investigation and rule out complications.
If complications related to COVID-19, are confirmed, you should be hospitalized in an isolated unit.
What should I do if I am told to go to the Emergency Department?
If you have to go to the hospital, you must wear a mask like everyone else and do frequent hand hygiene. Medical staff may ask you to wait at a certain location to avoid contact with vulnerable patients.
Can I pass the coronavirus to my child?
Some cases reported intrauterine or perinatal transmission of COVID-19 infection, but this is very rare and does not appear to be associated with birth defects. In rare cases, infection of a child with coronavirus has been described within a few days after birth, which in most cases was accompanied by mild symptoms. Research is currently underway so pregnant women should continue to take proper precautions to protect themselves from exposure to the coronavirus and seek medical attention if they have fever, cough, shortness of breath or general malaise.
How will my delivery go if I get infected?
Hospital Sant Joan de Deu and other medical centers in Spain continue to serve all healthy pregnant women while maintaining maximum safety. In addition, they serve all pregnant women with suspected COVID-19 infection or confirmed coronavirus infection.
To help all pregnant women who are nearing their due date, specific protocols have been established and are constantly being updated to keep them up to date with the latest recommendations. Infection with COVID-19 is not an indication for immediate termination of pregnancy unless the mother has other complications. The time and method of delivery will be determined on an individual basis, in accordance with the mother's condition, gestational age and obstetric conditions. If there are no additional contraindications, local or regional anesthesia (epidural or spinal) may be administered.
In general, early clamping of the cord is recommended and rapid removal of blood stains from the skin of the newborn. Individually and depending on the condition of the mother and child, skin contact may be tolerated in certain cases. In any case, as we mentioned earlier, the medical staff who see you will give you appropriate instructions depending on the situation, according to certain criteria.
What will happen to my baby after delivery if I have contracted COVID-19?
If the baby is well and has no symptoms, he can be in the same room with the mother, taking the necessary precautions. During hospitalization, if the accompanying family member does not have COVID-19 symptoms or has mild symptoms, they can stay in the room to help care for the baby and follow the same necessary precautions as the mother. If he has moderate or severe symptoms, he must self-isolate at home or go to another center for evaluation and treatment. Also, the newborn will be observed, he will be given a PCR test in the first hours of life to check if he has coronavirus infection.
This test is absolutely safe for the child. In the event that a newborn develops any symptoms or requires hospitalization for any reason, they will be transferred to a separate room to receive the necessary medical care on a case-by-case basis.
Can I breastfeed if I have coronavirus?
Experts insist that breastfeeding offers many benefits, including in the fight against it coronavirus SARS-CoV-2 , for example, the transfer of antibodies from mother to child. For this reason, and based on the available evidence, the Spanish Society of Neonatology and the World Health Organization recommend that breastfeeding be encouraged from birth when the clinical conditions of the baby and mother allow, always taking strict protective measures (hand hygiene and mask). However, these recommendations have changed in recent days and are subject to change, so we ask that you trust the medical staff who will be able to advise you on breastfeeding advice during labor and the postpartum period.
With regard to coronavirus vaccination during lactation , the results of the studies confirmed that the components of coronavirus vaccine were not found in milk, but antibodies were detected, therefore scientific societies recommend vaccination during lactation due to the additional benefit transmission of antibodies to the infant.
What should I do if home isolation is indicated for me?
It will be necessary to take a number of measures in order not to infect yourself or infect your family, so an infected person: Should be away from other people in the house : in a separate room and use a separate bathroom from the rest of the family if possible. Wear a mask: use a mask when you are in the same room as other people. Be careful with body fluids: a person who comes into contact with blood, mucus or other fluids must wear a mask, gown and disposable gloves.
And wash your hands well with soap. Wash your hands often, like the rest of the family. Carry out frequent cleaning in the house : Basically, keep utensils or frequently touched items clean, such as handles, door locks, computers, telephones, and bathrooms. Recommended cleaners with sodium hypochlorite (two tablespoons of chlorine per liter of water).
What is SARS-CoV-2?
COVID-19 disease is caused by SARS-Cov-2 coronavirus . The disease mainly affects people between the ages of 30 and 79, and is very rare in children under the age of 20. In pregnant women infected with COVID-19 as in other people, there may be fever, cough and shortness of breath.
Respiratory problems occur when an infection attacks the lungs and causes pneumonia.
¿How can I prevent the spread of SARS-CoV-2?
Below are recommended measures to reduce your chances of contracting the coronavirus.
Wash your hands frequently with soap, water, or alcohol-based solutions. It is especially important to do this after visiting public places and when in contact with other people or surfaces. Avoid touching your face with your hands, especially your mouth, nose and eyes . Use disposable tissues and wash hands immediately. When coughing or sneezing, cover your mouth and nose with the inside of your elbow and wash your hands immediately. Do not share food, utensils, or other items without washing them properly. Avoid close contact with people with respiratory symptoms. Use of a mask is not recommended unless symptoms of infection develop
Timeline of SARS-CoV-2 Coronavirus
In December 2019, The Wuhan Municipal Health and Sanitation Commission (Hubei Province, China) reported a group of cases of pneumonia caused by an unknown virus. In January 2020, Chinese authorities confirmed the identification of this virus and reported that it is a virus from the coronavirus family, the same family as other viruses that have previously caused respiratory infections.
This new virus has been named SARS-CoV-2 and the disease it causes is COVID-19.. January 30, 2020 The World Health Organization (WHO) declares the outbreak of SARS-CoV-2 coronavirus in China as a public health emergency of international concern. Subsequently, the outbreak spread outside of China, affecting other countries, many of which are in Europe. The outbreak in Italy affected a large percentage of the population, and from there a large number of cases appeared in Catalonia and the rest of Spain.
In during 2020 and 2021, different variants of SARS-CoV2 emerged with different ability to infect, transmit and cause severe disease. In July and August 2021, among pregnant women there was an increase in the number of cases of infection with coronavirus and serious diseases caused by COVID-19 . Currently, due to the high vaccination rate in Spain and pregnant women there is a lower rate of complications.
