Pregnancy can be detected 7-14 days after ovulation. There are two ways to measure pregnancy: first, blood human chorionic gonadotropin measurement, which may be detected 7 days after ovulation, but there are differences, not immediately after ovulation conception, the hormone is secreted only on the 6th day after the union of egg and sperm, blood HCG test is the most accurate and the earliest to determine pregnancy. Second, urine pregnancy test paper test, need to urine chorionic gonadotropin level to a certain concentration to check, about 2 weeks after ovulation, the egg survival 12-24 hours after ovulation, no accurate measurement of ovulation time after the instrument, the specific detection of pregnancy time also exists differences, not absolute. You can check regularly after intercourse, and if necessary, wait for 6 weeks of menopause for an ultrasound examination to confirm the diagnosis of early pregnancy when a gestational sac is seen in the uterine cavity.