Urine HCG refers to the urine pregnancy test, which usually detects pregnancy after 35 days of menopause. HCG is secreted by the placenta after the fertilized egg has been laid and is initially low in concentration, and can only be detected by pregnancy test strips when the value reaches a certain level. When a woman uses HCG test strips to detect pregnancy, the result can usually be detected about 1 week after the postponement of menstruation, i.e. two red bars on the urine pregnancy test strips are highly suspicious of early pregnancy, while one red bar proves that no pregnancy has occurred. When there are two red bars, one deep and one light, the test is weakly positive and can be retested after 1 week or the diagnosis can be clarified by taking a blood sample to check the level of chorionic gonadotropin. If a woman usually has delayed menstruation and has stopped menstruating for 50 days and still has a negative urine pregnancy test, she should go to the hospital to check the cause of menopause. In addition, although urine from any time of the day can be used to test for urinary HCG, the use of morning urine test can give more accurate results because the HCG concentration in the body is low due to the short duration of pregnancy.