How Long After Sex For Positive Pregnancy Test

How Long After Sex For Positive Pregnancy Test?

Getting a positive pregnancy test can be an exciting time, but you’re probably wondering, how long after sex do I need to wait before I can take the test? While there are a few factors that can impact the answer, there’s generally a good rule of thumb for when it’s best to take the test.

When to Take the Test

The recommended time for women to take the pregnancy test is about two weeks after sex. This is because it takes about two weeks for a fertilized egg to implant into the uterus and start releasing hormones that can be detected in a pregnancy test.

Factors That Impact Results

There are a few things that can change the timeline of your pregnancy test, such as:

  • Frequency of Sex: The closer together your sexual encounter are, the more likely a fertilized egg can become implanted. This can mean a shortened waiting time between sex and an accurate result.
  • Testing Method: Pregnancy tests vary in sensitivity, which means some tests can detect pregnancy earlier than others. A more sensitive test might be able to detect your pregnancy earlier.
  • Hormone Levels: Women with higher levels of the pregnancy hormone hCG may get a positive result sooner than women with lower hormone levels.

Accuracy of Test Results

Your results should be the most accurate if you take your pregnancy test two weeks after sex. If you take the test too early, it can give a false negative result. This means the test could show you’re not pregnant, even if you are.

If you take the test too late, it can give a false positive result. This means the test could show you’re pregnant, even if you’re not. This is why it’s important to wait until two weeks after sex to take the test.


Taking the pregnancy test at the right time is key for accurate results. Generally, it’s best to wait two weeks after sex to take the test, as this allows enough time for a fertilized egg to implant in the uterus and start releasing detectable hormone levels. However, there are a few factors that can impact the timeline of the test, so it’s important to keep those in mind when deciding to take the test.

Understanding the Timing Behind a Positive Pregnancy Test After Sex

Whether you’re trying to conceive a baby or avoiding an unintended pregnancy it’s important to know when you may be able to start taking a pregnancy test after having sex. Depending on a few factors, you may be able to get a positive result as early as 9 days after intercourse. Knowing the level of accuracy and when you can test may help you plan your testing.

Timeline and Accuracy of Pregnancy Tests After Sex

Since sex can result in pregnancy, pregnancy tests are available that can tell you if your body is making the pregnancy hormone hCG and growing a baby. So, how soon can you test after sex and still be accurate? We have listed the timeline and accuracy of tests below:

  • 9 to 12 Days after Sex: An early result pregnancy test can tell you if you’re expecting as early as 9 days after sex, but it is most reliable between 11 to 12 days after sex. This test is typically 97% accurate if done correctly and can be done with a urine sample at home.
  • 14 Days after Sex: All pregnancy tests should be accurate 14 days after sex as long as the test is done correctly with first morning urine. Most doctors recommend waiting until your period is due before testing.
  • 2 Weeks after Sex: 20 mIU/ml or higher hCG is detectable in the urine 2 weeks after conception or 14 days post ovulation. This test has a 99% accuracy rate.
  • 3 Weeks after Sex: 28 days after conception, 108-120 mIU/ml hCG is typically detected in the urine and blood, and this level can double every 48 hours. A positive result is typically achieved by this time and a doctor may be able to detect a pregnancy with a blood test.
  • 4 Weeks after Sex: 35 days after conception, hCG will typically reach it’s peak level at this point. Blood tests and ultrasounds performed at this time may detect a gestational sac or embryo.

What Can Impact the Accuracy of Pregnancy Tests?

In order to ensure accurate results from a pregnancy test, it’s important to consider any factors that could potentially impact the result. The following outlines when a test may not be accurate:

  • If you’ve been pregnant in the last three months when hCG levels may still be detectable in your urine
  • If you’re on certain medications like infertility drugs may contain hCG
  • Using a diluted or incorrect sample of urine
  • Using an expired or improperly stored test
  • Not following the directions carefully (testing too early or too late, etc.)


Knowing when to take a pregnancy test after sex is important so that you can look for a valid result. If the test is done correctly and the results are positive it indicates that conception may have occurred and you may be pregnant. It’s always best to confirm a positive result through your doctor to ensure that any additional tests and care can be started.

Your doctor may start you on pre-natal vitamins and other things that can ensure your pregnancy progresses as normal. If the results are negative, you can use this as a guideline for when to retest or talk to your doctor about any next steps.

Symptoms Of Pregnancy At 6 Weeks

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