Patient's question:
I usually have very regular periods, but this month it has been delayed by 3 days and I haven't had my period yet. My husband and I had sex 10 days ago. This morning, I used a pregnancy test kit to check, but there was only one line, indicating I'm not pregnant. I thought about going to the hospital for another check-up.What kind of help do I need: How long after having sex can you determine if you are pregnant?
Doctor's answer:
Generally, 8-10 days after sexual intercourse, a blood test can be used to check for HCG to confirm whether you are pregnant. This is currently the earliest and most accurate method. You can use a home pregnancy test 7 days after your period is delayed, which is relatively accurate. Two red lines on the test paper indicate a positive result, meaning you are pregnant.HCG typically begins to be secreted 6 days after conception. Blood HCG tests can detect pregnancy 9 days after intercourse, while home pregnancy tests can detect it 14 days after intercourse. Therefore, even if you are pregnant, it may not be detectable based on your situation.
If your period does not arrive when expected and you have not had it for 7-10 days, you should consider pregnancy and can use a home pregnancy test. It is not based on the time of intercourse, but rather clinically, it is usually calculated from the first day of your last period. Of course, the best time for a home pregnancy test is in the morning with first-morning urine.