How soon can you find out that you are pregnant

Since the earliest recorded history, women have had a strong desire to know whether they are pregnant as early as possible. The body goes through countless changes in the first trimester, and one of the first indicators is a change in the hormones that leave the body through urine.

Ancient Egyptians relied on a form of urine testing to determine pregnancy status way back in 1350 BCE. A woman urinated daily on wheat or barley seeds and if the plants grew, it meant she was pregnant. Modern-day validation suggests that test was about 70% accurate in detecting human chorionic gonadotropin (hCG), a hormone produced by a woman’s body soon after implantation of a fertilized egg inside the uterus.

Thankfully, urine-based pregnancy tests have evolved substantially. Women now have access to advanced tests that can detect a pregnancy as early as eight days after ovulation. But while many home pregnancy tests are marketed as simple and effective, getting accurate results comes down to how early in your ovulation cycle you take the test.

Ovulation generally occurs around day 15 of a 28-day cycle. In a normal pregnancy, an egg is fertilized in the fallopian tube and then travels into the uterus, where it implants in the uterine wall. After implantation, production of hCG starts from cells in the developing placenta (tissue that will feed the fetus). Trace levels of hCG can be detected as early as eight days after ovulation.

That means you could get positive results several days before you expect your period to start. However, the first part of your cycle is more variable than the second, making it tricky to determine the best time for an early test.

Pregnancy test accuracy

Each type of pregnancy test is designed to detect a set minimum level of hCG. This is why pregnancy test manufacturers advertise the way they do: “Know four days sooner,” or “Accurate up to six days before a missed period.” However, while home pregnancy tests are quite accurate – many boast a 99% detection rate based on laboratory testing results – marketing claims can be misleading.

For example, a 99% detection rate means a test can detect hCG 99% of the time on the day you miss your period. These statistics also assume that women are testing at the optimal time and following all instructions correctly.

Many home pregnancy tests available today are midstream urine dip tests, which are the traditional “pee-on-a-stick” tests and are fairly easy to use. There also are tests in which you pee into a cup and dip a test strip into the urine. The New York Times published a story ranking the best home pregnancy tests, citing a midstream test with an ergonomic grip as the easiest to use and most accurate.

Research has shown that average test results when women used the dip tests matched lab test results just 70% of the time, whereas 99% of women typically can get an accurate reading from a midstream test.

When to see a doctor

Most women who have a positive pregnancy test should wait a week or two before calling the Ob/Gyn office for a pregnancy blood test or ultrasound to confirm the pregnancy. We suggest waiting because the rate of early pregnancy loss is high, and it’s possible that you might have had a chemical pregnancy.

However, women with a history of ectopic pregnancy or current abdominal pain should call the doctor right away to be examined. Ectopic pregnancies implant outside of the uterus and produce hCG, resulting in positive pregnancy tests. However, these pregnancies can cause abdominal bleeding and prompt medical care is necessary. Women who have congenital heart defects or other chronic physical or mental health conditions should also see a doctor right away because treatment plans or medications might need to be altered to protect the woman and the fetus.

Advances in home pregnancy tests give women greater insight into what’s going on in their bodies sooner than ever before. No matter what your childbearing plans might be, it’s essential to get quick, accurate results at home to plan your next steps accordingly.

Chances are you already know you’re pregnant. Getting pregnant might have been emotionally and physically hard, and taken a long or unexpectedly short time. Everyone reacts differently.

Missed period

The first sign of pregnancy is usually missing a period, about 2 weeks after you’ve conceived. This isn't always reliable and if your periods aren’t regular you might not notice you’ve missed one.

Some women have a bit of bleeding as the egg embeds. Many women also experience tender breasts. This may be around the time they would have expected a period and can be confusing.

Home pregnancy test

A home pregnancy test is a reliable way of checking to see if you’re pregnant. You can do a test on the first day your period's due.

The test measures a hormone called human chorionic gonadotrophin (hCG) in your urine. For the result to be positive, your body must be making enough for the test to pick it up, usually about 2 weeks after you conceive.

You can get a free pregnancy test, support and advice at a sexual health clinic.

Find a sexual health clinic in your area

Assisted conception

If you’ve had assisted conception (such as IVF), you need to wait about 2 weeks after the transfer of an embryo before doing a pregnancy test.

When you find out you’re pregnant, you’ll have an ultrasound scan. From then on, you’ll have the same care as other pregnant women.

Dating your pregnancy

The start of your pregnancy's dated from the first day of your last actual period, although you probably conceived about 2 weeks after that. That means by the time you miss a period you could technically be 4 weeks pregnant if you have a 28-day cycle. But every woman's different.

Pregnancy usually lasts between 38 and 42 weeks. Your due date will be estimated when you attend your first ultrasound scan appointment. Most babies are born in the 2 weeks before or after this date.

When you know you're pregnant

As soon as you know you’re pregnant:

Seeing your midwife early

Seeing a midwife as early in your pregnancy as possible gives you and your baby the best start. You'll be able to discuss how your lifestyle might impact on your baby and the choices you can make during pregnancy.

How you might be feeling

You might be feeling:

• overjoyed and excited
• have mixed emotions or not feel the way you expected

Maybe your pregnancy is a surprise and it’s taking a while to get used to the idea. Your partner can feel the same.

Talk about your feelings

Whatever your situation, it’s important to talk about how you’re feeling and make sure you’ve got support.

Your midwife's there for you, dads and partners too.

If you’ve got any worries or questions, the people involved in your care are happy to listen and help give you the support you need.

Your privacy

Sometimes young people worry about sharing their pregnancy with a professional.

Young people aged 13 and over have the same rights to medical confidentiality (privacy) as an adult and the same rights and responsibilities as all parents.

It’s important you're able to:

• access the care and support you need and are entitled to
• speak to an adult you trust so you can get the support you need during your pregnancy and once your baby's born

Your midwife can help you find out more about the support available from the NHS and other services.

Confidentiality

Your midwife or doctor won't tell anyone else about your pregnancy without your agreement if they believe:

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