Menstruation is delayed for five days, blood human chorionic gonadotropin, generally can be measured, but urine human chorionic gonadotropin, it may not be able to detect, because after the fertilized egg implantation, the body of the human chorionic gonadotropin first detected in the blood, and then only in the urine, so too early for the urine test, it may not be able to detect, more than a week after menopause for the urine test is more appropriate and more accurate. The urine test is more appropriate and has a higher accuracy rate. First of all, the most common reason for delayed menstruation is pregnancy, so it is necessary to have an early pregnancy test in time. Secondly, delayed menstruation is caused by endocrine disorders, and early pregnancy tests show negative results. Early pregnancy tests are mainly hormone level tests and ultrasound tests, and after pregnancy, you need to pay attention to regular prenatal checkups, so as to realize eugenics.