You should wait to take a pregnancy test until the week after your missed period for the most accurate result. If you don't want to wait until you've missed your period, you should wait at least one to two weeks after you had sex. If you are pregnant, your body needs time to develop detectable levels of HCG.

Can a pregnancy test detect at 1 week?

Most tests can produce accurate results on the first day after a missed period, but to ensure accuracy, it is advisable to start testing 1 week after a missed period. For around 10–20% of pregnant people, a home pregnancy test does not accurately detect the pregnancy on the first day of their missed period.

How soon will a pregnancy test read positive?

It varies by test, but in short, the soonest a home pregnancy test can read positive is about four days before your first missed period, or about three and a half weeks after an egg is fertilized.