The main detection methods include blood HCG, urine HGC and ultrasonography, among which blood HCG can detect pregnancy earlier. Under normal circumstances, it takes about 7 days for a fertilized egg to complete implantation, and the blood chorionic gonadotropin in the body will gradually increase after the fertilized egg has implanted. In contrast, urinary chorionic gonadotropin levels are slightly delayed compared to the rise in blood chorionic gonadotropin, and most pregnancies can be detected by checking urinary HCG levels around 35 days after menopause. Ultrasound detection of pregnancy, on the other hand, requires the observation of a gestational sac structure in the uterine cavity and can detect pregnancy around 6-7 weeks after menopause. Therefore, it is important to visit the obstetrics and gynecology department of the hospital promptly after menopause to clarify whether pregnancy or other diseases are present.