Is 4 days before period too early to test

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.

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

About this Product

No other brand tells you earlier!1

When you may be pregnant, the earlier you know, the better. Featuring First to Detect™ technology, the FIRST RESPONSE™ Early Result Pregnancy Test is sensitive enough to capture scant amounts of pregnancy hormones to give you results 6 days sooner than your missed period.1

EARLY RESULT PREGNANCY TEST

Is 4 days before period too early to test

  • Our #1 best-selling pregnancy test
  • No other brand tells you earlier1
  • Over 99% accuracy from the day of the expected period2
  • Detects all forms of the pregnancy hormone3
  • Read your results in just 3 minutes
  • One large window – two lines means pregnant; one line means not pregnant
  • Scan & Confirm results for FREE, with EasyRead app. Instantly converts your pregnancy test results into the words "Pregnant"or "Not Pregnant"

Early Pregnancy Detection Matters3

The first few weeks of pregnancy are critical to fetal development, so early prenatal care is important for a healthy birth weight and the baby’s survival. The sooner you know you’re pregnant, the sooner you can begin making healthy pregnancy choices for yourself and your baby that include diet, nutrition and limiting your exposure to hazards.

Things to Know About Testing Early

Some pregnant women may not have detectable amounts of the pregnancy hormone in their urine on the day they use the test. The amount of pregnancy hormone increases as the pregnancy progresses. In laboratory testing, FIRST RESPONSE™ detected the pregnancy hormone levels in 76% of pregnant women, 5 days before their expected period; in 96% of pregnant women, 4 days before their expected period; in >99% of pregnant women, 3 days before their expected period; in >99% of pregnant women, 2 days before their expected period; in >99% of pregnant women, 1 day before their expected period; and in >99% of pregnant women, on the day of their expected period.

Using the EasyRead App

The EasyRead app instantly converts your pregnancy test results into the words "Pregnant" or "Not Pregnant." Getting twice the certainty* is now as easy as 1,2,3, Confirm. Tell me more!
*Double the confirmation; Same accuracy of results

Read full details and instructions before taking test, click here. Then, remove test stick from wrapper and take off the Overcap.

Hold stick by Thumb Grip, with the Absorbent Tip pointed down, and the Result Window facing away from body. Place Absorbent Tip into your urine stream for 5 seconds only.

Collect urine in a clean, dry cup. Dip the entire Wide Absorbent Tip into urine for 5 seconds only.

While holding stick with Wide Absorbent Tip pointed down, put Overcap back on. Place stick on a flat, dry surface, Easy Read Result Window facing up.

The pink color moving across the Easy Read Result Window means the test is working.

Wait 3 minutes before reading result.

Using the EasyRead App

The EasyRead app instantly converts your pregnancy test results into the words "Pregnant" or "Not Pregnant." Getting twice the certainty* is now as easy as 1,2,3, Confirm. Tell me more!

*Double the confirmation; Same accuracy of results

PREGNANT: Two Pink Lines appear in the Easy Read Result Window. Note: One line may be lighter than the other.

This result shows that the pregnancy hormone (hCG) was detected. Please see your healthcare professional to confirm this result.

NOT PREGNANT: Only One Pink Line appears in the Easy Read Result Window.

CAUTION: Although you may not be pregnant, it could also be too early to tell. For instance, your urine may not have enough of the pregnancy hormone to be detected yet. If you do not get your period within 7 days, retest with another FIRST RESPONSE™ Early Result Pregnancy Test. If you receive another Not Pregnant result and your period still hasn’t started, call your healthcare professional.

1 FIRST RESPONSE™ detects the pregnancy hormone 6 days sooner than the day of your missed period (5 days before the day of expected period).

2 >99% accurate at detecting typical pregnancy hormone levels. Note that hormone levels vary.

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Frequent Questions

How does the FIRST RESPONSE™ Early Result Pregnancy Test work?

The test detects human chorionic gonadotropin (hCG) in urine. hCG is the hormone your body produces during pregnancy.

When can I test with FIRST RESPONSE™ Early Result Pregnancy Test?

The FIRST RESPONSE™ Early Result Pregnancy Test is designed to detect hCG as early as 6 days before your missed period (5 days before day of the expected period). The amount of pregnancy hormone increases as pregnancy progresses. In laboratory testing with early pregnancy urine samples, FIRST RESPONSE™ gave the following results:

NUMBER OF DAYS BEFORE THE EXPECTED PERIOD 5
4
3
2
1
% OF SAMPLES FROM PREGNANT WOMEN GIVING A POSITIVE RESULT
76%
96%
>99%
>99% >99%

How do I use the First Response EasyRead App?

EasyRead app scans your Early Result or Rapid Result test stick results and instantly converts your results into the words “Pregnant” or “Not Pregnant.”
Tell me more!

Is 4 days before period too early to test

Your privacy is our top priority! EasyRead does not save your scanned result or associate your information with the results.

How accurate is the test?

FIRST RESPONSE™ Early Result is >99% accurate from the day of ‘missed’ period. However, some pregnant women may not have detectable amounts of pregnancy hormone in their urine on the day of the test, or may have miscalculated the first day of their period.

What do I do if the result is positive (pregnant)?

A positive (pregnant) test result shows that the pregnancy hormone (hCG) was detected, which normally indicates pregnancy. You must see your doctor to confirm that you are pregnant. If you test positive, but think you may not be pregnant, you should check with your doctor.

What do I do if the result is negative (not pregnant)?

You may not be pregnant, or it may be too early to tell. If you do not get your period within 7 days, you should retest with another FIRST RESPONSE™ Early Result Pregnancy Test. It is possible that you miscalculated the length of your cycle, or your urine may not have had enough of the pregnancy hormone for the test to give you a positive result. If upon retesting you get another negative result and your period has still not started, you should call your doctor.

I have waited longer than 3 minutes, and there are still no lines in the Result Window. Is there anything wrong?

Your result should appear within 3 minutes. There should be at least one pink line in the Easy Read Result Window at 3 minutes to indicate that the test is completed and you have done it correctly. If not, the test is invalid. This could be due to insufficient urine on the Wide Absorbent Tip or not holding the device with the Wide Absorbent Tip pointing downward while replacing the Overcap. You should retest with another device, carefully following all directions.

Will the result change if left standing for a certain period of time?

The test result should be read as soon as possible after waiting 3 minutes. A negative result should not be read after 10 minutes.

Do any drugs or medications affect the test?

Only medications containing the pregnancy hormone (hCG) can affect the result (e.g., A.P.L., Pregnyl, Profasi and Pergonal). The test should not be affected by hormone therapies containing: Clomiphene citrate (e.g., Clomid and Serophene); alcohol; painkillers; antibiotics; or the contraceptive pill.

If you have any questions call us, toll-free at 1-800-367-6022, Monday-Friday from 7:00 AM to 5:00 PM Eastern Time.

1 FIRST RESPONSE™ detects the pregnancy hormone 6 days sooner than the day of your missed period (5 days before the day of expected period).
2 >99% accurate at detecting typical pregnancy hormone levels. Note that hormone levels vary.
3 FIRST RESPONSE™ Early Result detects all of the major pregnancy hormone forms commonly found in urine. Use as directed.
4 A trademark of What to Expect. Used under license; Reprinted with permission. © 2020 What to Expect. All Rights Reserved.
** This app only works with our Early Result test or Rapid Result test. Both of these tests are also included within our Triple Check testing kit.

Can you take a pregnancy test 4 days before?

When you want to know if you're pregnant waiting to test can be hard. That's why Clearblue Ultra Early Pregnancy Test can be used up to 6 days before your missed period, which is 5 days before you expect your period to start.

Can you get a false negative 4 days before expected period?

If you're testing before the day of your expected period, you may see a negative result – even if you're pregnant – if: Your test wasn't sensitive enough for early testing. You didn't use the first urine of the day, so concentration of hCG in your urine wasn't high enough.

Can you get a faint positive 4 days before period?

Some very sensitive pregnancy test kits can detect pregnancy as early as 6 days before your missed period (5 days before you expect your period), however the levels of hCG this early are so low that you can expect any line to be faint.

How accurate is testing 3 days before your period?

In laboratory testing, FIRST RESPONSE™ detected the pregnancy hormone levels in 76% of pregnant women, 5 days before their expected period; in 96% of pregnant women, 4 days before their expected period; in >99% of pregnant women, 3 days before their expected period; in >99% of pregnant women, 2 days before their ...