How to test pregnant

When To Take, Types & Accuracy

Overview

What is a pregnancy test?

A pregnancy test is a way to determine if you’re pregnant. If your pregnancy test is positive, it means you’re pregnant. If the test is negative, it means you aren’t pregnant. Pregnancy tests work by detecting human chorionic gonadotropin (HCG), a hormone your body makes when you’re pregnant.

From the very beginning of pregnancy, your body starts to go through changes to support the cells that will develop into your baby. One thing that happens very quickly is the production of HCG. If you’re pregnant, your body starts to produce more HCG. Your HCG levels start to build up once the fertilized egg implants in your uterus — about six to 10 days after conception.

There are two main types of pregnancy tests — urine tests and blood tests. Often, you’ll take a urine test at home with a home pregnancy test. This type of test is available over the counter (you don’t need a prescription from your healthcare provider) and in a variety of price ranges. Blood tests to check for pregnancy happen in your healthcare provider’s office and involve giving a sample of your blood. The other way to confirm a pregnancy is by using an ultrasound. Your provider performs an ultrasound in their office.

There are several reasons why you might take a pregnancy test. You could be trying to get pregnant and hoping for a positive result. You might have experienced an issue with your birth control. You might even be about to have a medical procedure or start a new medication that could be complicated by pregnancy. No matter what the reason, if you ever have any questions about your test results, the best thing to do is reach out to your healthcare provider.

What hormone levels are checked for a pregnancy test?

Pregnancy tests look for an elevated amount of HCG. Levels of HCG rise quickly – doubling every few days in the first weeks of pregnancy. The placenta produces HCG. Only pregnant people have a placenta, which develops shortly after a fertilized egg attaches to your uterine wall.

When should I take a pregnancy test?

If you think you could be pregnant, it’s a good idea to take a test and make sure. Home pregnancy tests can differ in how early they’ll detect a pregnancy. In many cases, you might get a positive result from an at-home test as early as 10 days after conception. For a more accurate result, wait until after you’ve missed your period to take a test. Remember, if you take a test too soon, it could be negative even if you’re pregnant. If you get a negative test and then miss your period, take another test.

What time should I take a pregnancy test?

In general, the best time is when you have your first morning pee. However, some pregnancy tests are sensitive enough to detect HCG no matter what time of day you take the test. When possible, try to wait until it’s been three hours since your last pee before you take the test. You could also take two pregnancy tests to confirm you get the same result.

Test Details

How do pregnancy tests work?

When you take a pregnancy test, it’s looking for the amount of human chorionic gonadotropin (HCG) in your body. You can find HCG in your pee or blood. HCG needs time to build up in your body. Each day of early pregnancy, your body will create more HCG. As the weeks go on, you’ll have more and more HCG in your body, which will make it more likely that a pregnancy test will show as positive. This means if you take a test too soon, it will come back negative.

Pregnancy tests work by reacting to the amount of HCG in either your pee or blood. In a urine test, a piece of reactive paper detects the HCG. This test might show a plus sign, double vertical lines or even the word “pregnant.” Different tests will show a positive result in unique ways. Read the directions that come with the test to know what a positive result will look like. For example, most tests have a control window that shows up first. Seeing a symbol in this window will tell you that the test is working. Keep in mind that different brands of tests will take different amounts of time to show a result.

If you take a blood test, your provider will take a sample of your blood and send it to a lab. The lab will determine the amount of HCG in your blood. Your provider will contact you with your results.

What are the different types of pregnancy tests?

There are two main types of pregnancy tests: urine and blood tests.

Urine tests are typically done at home — though you can have a urine test done at your healthcare provider’s office — while your provider performs a blood test.

At-home pregnancy test

An at-home test uses your pee to look for HCG. They contain special strips that detect HCG. Most at-home pregnancy tests are about 99% effective when used correctly. That’s about the same accuracy rate as pregnancy tests done in your healthcare provider’s office. These tests are available in most drug or grocery stores. They’re easy to use and inexpensive. It’s important to read the instructions on these tests before taking them.

There are three ways to take an at-home pregnancy test:

• Pee in a clean cup. Then, place one to several drops of your pee on a chemical strip.
• Place the pregnancy test strip in your urine stream while you pee.
• Pee in a clean cup and then dip the test strip in the pee while it’s still in the cup.

For many of these tests, HCG can be detected in your urine about 10 days after conception. However, taking it after you miss your period reduces the chance of getting a false-negative result. A missed period typically happens around 14 days after conception.

There are a few things to keep in mind when you take a home pregnancy test, including:

• Use your first morning pee if you can. This is the time of day when your HCG levels will be the most concentrated and easily detected. If you do it at another time of day, try to make sure your pee has been in your bladder for at least three hours.
• Don’t drink excessive amounts of fluids before you take a pregnancy test. This can dilute (thin out) your HCG levels.
• Check the expiration date on the package.
• Read the directions that come with the test thoroughly before starting the test, and follow every step exactly.

Blood test

Another type of pregnancy test is a blood test. Blood tests are rarely done because they’re expensive and tend to have the same result as a urine test. This type of pregnancy test is done using a small sample of blood from a vein in your arm. This blood test not only detects whether the pregnancy hormone is in your body, but can also determine how much of the hormone is present. This is helpful for when your provider needs to know the exact amount of HCG in your blood, not just if there’s HCG in your blood.

A blood test for pregnancy might be done in special circumstances, such as for people who are having fertility treatments or when the healthcare provider thinks there might be a problem.

These blood tests are slightly more sensitive than urine tests because they can detect very small levels of HCG. That means they can provide a more accurate answer very early on in pregnancy — within seven to 10 days after conception. For this test, your blood sample is taken at your provider’s office or the hospital, then sent to a lab for analysis. Results might take anywhere from a few hours to two days.

Your provider might also choose to use a blood test to compare HCG levels during the pregnancy. Your HCG levels usually double about every two days during the first few weeks of pregnancy. If the levels don’t rise, it might suggest a problem with the pregnancy. Extremely high HCG levels might mean that you’re carrying twins or that there’s an issue with the pregnancy.

Are all home pregnancy testing methods the same?

Most brands of at-home pregnancy tests are reliable. Although the exact testing method of different pregnancy tests can differ from one type to the other, they all look for HCG in your body. If you’re using an at-home test, most will give you the same result. The difference with your at-home tests will be the sensitivity of the test. Some might be more sensitive than others and produce a positive result (detect HCG in your urine) sooner than others. For the most accurate reading, it’s still recommended that you wait until you’ve missed your period. At that point, all tests should be accurate.

What are the advantages of using a home pregnancy test?

There are quite a few advantages to using a home pregnancy test, including:

• Pregnancy tests are inexpensive.
• They’re easy to use.
• Home tests provide results quickly.

According to pregnancy kit manufacturers, most at-home pregnancy tests are 98% to 99% accurate when you use them exactly as instructed. Positive results can be trusted, but you can get a false negative result if you take the test too soon.

Blood tests tend to be more expensive and inconvenient. However, blood tests can detect pregnancy sooner and are the only tests to show specific amounts of HCG in your body.

Is there anything you shouldn’t do before a pregnancy test?

Most pregnancy tests don’t ask you to avoid activities or change your lifestyle. The only medication that may interfere with your results is fertility medication containing HCG.

Here are some helpful tips you should follow for the best results:

• Read the instructions carefully before doing anything.
• Wait until you miss your period to take the test.
• Use your first pee or pee from a full bladder. Chugging water before your test in order to pee may affect your results.

Results and Follow-Up

How long does it take to get results of a pregnancy test?

Each home pregnancy test is different. Read the instruction manual carefully. It will tell you how many minutes to wait for your result. In most cases, you can expect to wait three minutes for your result. Keep in mind that if you wait too long to check your result, it may be inaccurate.

Even a faint line on a pregnancy test could mean you’re pregnant. Your test will also have a control window that indicates that you took the test correctly. The instructions with your test will outline all of this. If you have any questions or remain unsure of your result after several tests, please contact your healthcare provider.

A faint line is different than an evaporation line. An evaporation line may appear if you wait too long to check your results — meaning your pee is dry. Most tests ask you to read your results before 10 minutes. This ensures the pee doesn’t dry up and you don’t get an evaporation line.

How soon will a pregnancy test be positive?

It depends on which type of test you use. Some at-home pregnancy tests may be able to detect pregnancy before you miss your period. However, if you want the most accurate result, it’s best to wait until you have missed your period.

How accurate are pregnancy tests?

Pregnancy tests are about 99% accurate when you use them correctly.

How common are false results on pregnancy tests?

False results — either a false negative or a false positive — mainly happen due to using the test incorrectly. The main reason for a false-negative is testing too early. You might also get a false-negative if you use a home test incorrectly, such as using too much or too little pee. It’s important to follow the directions on your test kit to make sure you get an accurate result.

Can a positive test be wrong?

A false positive is rare, but it can happen. This may be the case if you experience a chemical pregnancy or lose the pregnancy shortly after the fertilized egg attaches to your uterine wall.

What type of pregnancy test confirms pregnancy first?

A blood test confirms pregnancy first because it can detect a smaller amount of HCG as compared to a test that uses your pee.

Are there any medications that can change the result of my pregnancy test?

For the most part, medications don’t change your pregnancy test results. Antibiotics, pain relievers and alcohol don’t impact your test results.

However, fertility drugs are one exception. These medications can sometimes cause a false-positive on your pregnancy test. If you’re taking fertility medications, reach out to your healthcare provider about your results to make sure they’re accurate.

What should I do after getting a positive pregnancy test?

If you take a pregnancy test at home and it’s positive, there are a few things you should do, including:

• Take your prenatal vitamins. Pick a vitamin with folic acid included in the ingredient list. Start taking these while you’re trying to conceive, if possible. This is because the folic acid can help prevent complications during fetal development.
• Call your healthcare provider for an appointment. This appointment might not happen for several weeks — but it’s a good idea to call your provider and make an appointment.
• Make sure to pursue healthy habits like not drinking alcohol or smoking during pregnancy. You may also want to limit the amount of caffeine you consume each day during pregnancy.

Additional Details

Will an ectopic pregnancy show up on a pregnancy test?

Yes, you’ll still have a positive result on a pregnancy test if you have an ectopic pregnancy.

A note from Cleveland Clinic

Pregnancy tests are how a person finds out if they’re pregnant. Most people take a pregnancy test at home using their pee. However, you can also take a pregnancy test at your provider’s office using a blood sample or pee. For the most accurate results, wait until you miss your period to take a home pregnancy test. If you use pregnancy tests correctly, the results are 99% accurate. Contact your healthcare provider if you have questions about the results of your pregnancy test.

Doing a pregnancy test - NHS

If you have missed a period and recently had unprotected sex, you may be pregnant. Pregnancy tests are most reliable from the first day of your missed period.

When you can do a pregnancy test

You can carry out most pregnancy tests from the first day of a missed period. If you don't know when your next period is due, do the test at least 21 days after you last had unprotected sex.

Some very sensitive pregnancy tests can be used even before you miss a period.

You can do a pregnancy test on a sample of urine collected at any time of the day. It doesn't have to be in the morning.

Where you can get a pregnancy test

You can buy pregnancy testing kits from pharmacists and some supermarkets. They can give a quick result and you can do the test in private.

The following places provide free pregnancy tests:

• sexual health services
• some young people's services – call the national sexual health helpline on 0300 123 7123 for details
• Brook centres for under-25s – find your nearest Brook centre

You may also be able to get a pregnancy test free of charge from your GP.

How does a pregnancy test work?

All pregnancy tests detect the hormone human chorionic gonadotrophin (hCG), which starts to be produced around 6 days after fertilisation.

Most pregnancy tests come in a box that contains 1 or 2 long sticks. You pee on the stick and the result appears on the stick after a few minutes. All tests are slightly different, so always check the instructions.

Will a pregnancy test work if I'm on the pill?

Yes.

Some methods of contraception, such as the contraceptive pill, contain hormones, but these hormones will not stop a pregnancy test working.

No method of contraception is completely effective, so it's important to take a pregnancy test if you think you might be pregnant.

Pregnancy test results

Home pregnancy tests are accurate as long as you follow the instructions correctly.

A positive test result is almost certainly correct. However, a negative test result is less reliable.

The result may not be reliable if you:

• do not follow the instructions properly
• take the test too early

Some medicines can also affect the results.

If you get a negative result and still think you're pregnant, wait a few days and try again. Speak to your GP if you get a negative result after a second test but your period has not arrived.

Continuing with the pregnancy

If you're pregnant and want to continue with the pregnancy, contact your GP or a midwife to start your antenatal care. You can use the pregnancy due date calculator to work out when your baby is due.

If you're not sure you want to be pregnant

If you're not sure about continuing with the pregnancy, you can discuss this confidentially with a healthcare professional. Your options are:

• continuing with the pregnancy and keeping the baby
• having an abortion
• continuing with the pregnancy and having the baby adopted

As well as a GP or a nurse at your GP surgery, you can also get accurate, confidential information – from the age of 13 – from the following:

• sexual health services
• the MSI Reproductive Choices website
• the British Pregnancy Advisory service website
• the National Unplanned Pregnancy Advisory service website

All these services – including community contraceptive clinics – are confidential. If you're 13 or older, the staff won't tell your parents. They'll encourage you to talk to your parents, but they won't force you. 

If you're under 25 and would prefer advice specifically for young people, the sexual health charity Brook provides a range of services for young people. The Brook website contains information on pregnancy choices. You can also use the Ask Brook 24/7 service.

Video: Is the pregnancy test accurate?

In this video, a midwife explains when you can take a pregnancy test and how to do it properly.

Media last reviewed: 5 February 2020
Media review due: 5 February 2023

Page last reviewed: 9 February 2022
Next review due: 9 February 2025

How to determine pregnancy without a test

How to determine pregnancy without a test and what signs indirectly indicate that your beloved baby will be born soon? Of course, only a blood test can give a 100% guarantee, but the presence of certain signs may indicate its possible onset.

Classic signs of pregnancy

The most common early signs and symptoms may include

• Delayed menses. nine0011 Problems with the regularity of the menstrual cycle may be associated with hormonal imbalance in the body. But if the delay arose for the first time, and before that the cycle was as accurate as a clock, then it is likely that you are pregnant.
• Early toxicosis with severe nausea and vomiting - the most common sign of an interesting situation, but not every woman has.
• Pain in both breasts or enlargement. Nipples can become very sensitive and change color. Sometimes in the early stages, colostrum is released from them with slight pressure. nine0012
• Pain in the pelvic region, similar to menstruation. But this sign can also indicate such a serious pathology as an ectopic pregnancy.
• Increased amount of discharge from the genitals. This can usually be observed during ovulation. Normal discharge is clear and odorless. When a whitish tint or a curdled structure appears, thrush can also be assumed, which is a common problem for expectant mothers. But in this case, you can not do without treatment. During the period of bearing a child, it is necessary to protect your body as much as possible from any, even such a safe disease. nine0012
• Increased or vice versa reduced libido. Every woman experiences jumps in sexual desire in one direction or the other due to hormonal changes occurring in the body. Therefore, men should treat this with understanding, knowing that they have not become less loved, but these are just signs of pregnancy.
• Frequent urination, despite the fact that you do not drink more often and there are no inflammatory diseases of the genitourinary system. A similar phenomenon is associated with a slight relaxation of the sphincter of the bladder due to hormonal processes. And with the growth of the uterus and, accordingly, with the increase in pressure on the bladder, going to the toilet will become even more frequent. nine0012