The fastest time to detect pregnancy is 7 days after intercourse and no later than 17 days after intercourse. The easiest way to monitor pregnancy is to test yourself at home using a morning pregnancy test or a pregnancy test stick, preferably using the first urine in the morning, the test can be false positive or false negative, the morning urine test will be more accurate. If you test positive at home, you can go to the hospital 10-14 days after intercourse to check the blood chorionic gonadotropin, also known as blood HCG test. Blood HCG can be checked every other day, and if it doubles every other day, it indicates a normal intrauterine pregnancy. In addition, a simple way to determine after pregnancy can also be based on basal body temperature measurement. If the basal body temperature measured for 17 consecutive days is around 37°C, the possibility of pregnancy is also significantly higher.