Pregnancy can usually be detected as early as 10-15 days after ovulation. Early pregnancy tests, which are often used to determine whether a woman is pregnant by detecting HCG levels in her urine, are also known as human chorionic gonadotropin, which is secreted by the trophoblast cells of the placenta. It is secreted by the trophoblast cells of the placenta. HCG begins to be secreted about 6 days after the egg is fertilized, and can often be found in increased levels in the urine and blood, and pregnancy can usually be detected about 10-15 days after the egg is fertilized. Generally, pregnancy can be detected by radioimmunoassay about 10 days after menopause with elevated levels of HCG in the subject’s blood. You can use pregnancy test paper to test the urine of the test subject, if the result is positive and need to combine with the clinical manifestations to diagnose pregnancy. However, it is also necessary to determine whether the pregnancy is intrauterine, so ultrasound is used. Common early pregnancy phenomena generally include menopause, healthy women with a history of sexual intercourse, usually regular menstrual cycle, once the menstrual period, should be considered pregnancy, menopause more than 10 days, especially should be highly suspicious of pregnancy. Early pregnancy will appear frequent urination phenomenon, mainly due to the uterus anteriorly increased pressure bladder, when the uterus increases beyond the pelvis, frequent urination symptoms naturally disappear. Therefore, pregnancy can be detected as early as 10 days after menopause.