In women with regular menstrual cycles, a urine pregnancy test 5-7 days after menstruation is delayed is a clear diagnosis. One week after intercourse during ovulation in women of childbearing age, the fertilized egg settles in the uterus and the chorionic gonadotropin level in the mother gradually rises. Pregnancy can usually be confirmed by a urine HCG test at least 5 weeks after menopause. The accuracy of the diagnosis can be improved by drawing blood for a blood HCG test, which is more accurate, and by vaginal ultrasound to detect a clotted embryo. The longer the period of menopause, the higher the level of HCG in the body and the higher the accuracy of the test. For women with irregular menstrual cycles, the diagnostic accuracy can be improved by repeated examinations combined with blood tests and ultrasound examinations. In addition, some women may experience dizziness, nausea, vomiting, weakness and loss of appetite after pregnancy. When these symptoms occur, a urine HCG test or a blood test for HCG should be done promptly to clarify the diagnosis of pregnancy.