Pregnancy can be detected by testing urine HCG when menstruation is delayed and by testing blood HCG about 10 days after intercourse. Human chorionic gonadotropin (HCG) is mainly secreted by gestational trophoblast cells during pregnancy, and elevated levels of HCG can generally be detected in the mother’s blood about 1 day after the fertilized egg is deposited, so pregnancy can be determined about 10 days after intercourse; and urine HCG can be detected by using early pregnancy test strips, and pregnancy can generally be detected only when menstruation is delayed. Whether through the blood HCG, or urine HCG to determine the initial pregnancy, must be carried out ultrasound examination to clarify the normal intrauterine pregnancy, and can rule out ectopic pregnancy and gravida and other pathological pregnancy. For those who have not yet clarified the normal intrauterine pregnancy, in the early pregnancy symptoms such as abdominal pain, vaginal bleeding, etc., you need to go to the hospital in a timely manner to exclude the possibility of ectopic pregnancy.