Generally speaking, pregnancy can be detected at the latest 40 days after menopause, but there are individual differences in the exact time. When a woman has intercourse during ovulation, the sperm and egg combine to form a fertilized egg, and the egg will implant, and the HCG in the body will rise significantly, and the pregnancy can be detected one day after the implantation by taking a blood sample and checking the HCG in the blood. HCG in urine rises slower, and pregnancy can be detected using test strips or pregnancy tests about 2 weeks after intercourse or 3 to 7 days after regular menstruation. Some women have irregular menstruation, the time to detect pregnancy may be later, but usually not more than 40 days, once the phenomenon of delayed menstruation should be timely blood test blood HCG or use a pregnancy test stick to test for pregnancy, diagnosed pregnancy need to be timely consultation, regular pregnancy tests.