How long can I take a pregnancy test after intercourse?
Fan question: How long can I take a pregnancy test after intercourse?
A: Keep in mind that there is a danger in taking a home pregnancy test too soon, since you can easily get a false negative. (The pregnancy test says that you are pregnant, but a few days afterwards, you get your period.) On the other hand, if you wait too long, you have less time to prepare yourself for the reality of pregnancy.
Pregnancy tests look for a specific chemical that the body begins to make as soon as a fertilized egg implants in the uterus. But after an egg has been fertilized, it takes 6-9 days for the embryo to implant. Then it takes another week for the body to build up enough of the chemical (called human chorionic gonadotropin or hCG) to register on a pregnancy test. In other words, it takes about 2-3 weeks after ovulation for the chemical to show up in the body, or about one week after a woman should have gotten her period.
There are two types of tests women can take to find out if they’re pregnant; a blood test or a urine test. A blood test is more sensitive than a urine test and needs to be done by a doctor. A urine test can be done by a doctor or using an at-home pregnancy test.
Many women prefer the convenience of taking a pregnancy test at home before visiting the doctor for confirmation. At-home pregnancy tests looks for hCG and they can give relatively accurate results if done according to instructions. However, it’s always a good idea to read the packaging because different at-home tests have different sensitivities. Some early response tests can provide an accurate result on the first day of a missed period. Others will provide the most accurate result one week after a missed period.