A pregnancy test can be used about 14 days after intercourse to determine if you are pregnant. Women who wish to have children can have a blood test for HCG (human chorionic gonadotropin) about 10 days after intercourse to determine if they are pregnant. Since HCG appears later in the urine, pregnancy can usually be detected with a pregnancy test about 14 days after intercourse. After pregnancy is confirmed by blood or urine HCG test during early pregnancy, ultrasonography should be performed as prescribed by the doctor to identify normal intrauterine pregnancy and to rule out pathological pregnancy such as ectopic pregnancy and hyperemesis gravidarum. Early pregnancy should also pay attention to appropriate rest, avoid exertion and strenuous activities, according to the early pregnancy response to increase nutrition.