Pregnancy is confirmed by a blood test for human chorionic gonadotropin (HCG). During the process of conception, the fertilized egg can differentiate into trophoblast cells when it develops into a blastocyst, and the trophoblast cells usually start to produce HCG 1-2 days later, and HCG can be measured in maternal serum 7-10 days after intercourse. In addition, HCG measurement by blood draw is earlier and more accurate than the traditional urine HCG test (i.e. early pregnancy test or pregnancy test stick). In addition to diagnosing early pregnancy, HCG can be used to detect ectopic pregnancy, pre-eclampsia, fetal abnormalities, and fetal growth restriction in a timely manner. In ectopic pregnancy, the blood HCG level is significantly lower than in normal pregnancy, and in spontaneous miscarriage, premature miscarriage, fetal malformation and fetal growth restriction in utero, the blood HCG concentration may also all be reduced, so the blood HCG value can be monitored regularly in the first trimester. After pregnancy is confirmed, pregnant women should have regular maternity checkups, pay attention to more rest, avoid strenuous exercise, and eat milk, soy products, lean meat, carrots, etc. appropriately.