Early morning pregnancy try to test in the morning. After the period has been delayed for roughly 1 week, it is more accurate to take a mid-morning urine test, which is more concentrated and contains more human chorionic gonadotropin. Therefore, if the tester is really pregnant, the likelihood of a positive early pregnancy test will be higher. In contrast, at night when the urine has been diluted throughout the day, the level of human chorionic gonadotropin in the urine is lower, so a false negative result may occur, resulting in an incorrect test result. If the menstrual cycle is 25-28 days and menstruation is delayed for 7 days, morning urine can be detected with a pregnancy test stick, but sometimes the test is not very accurate, and it is relatively accurate to draw blood for HCG 2-3 days after menstruation is delayed. If the menstrual cycle is not normal, menstruation is delayed for 10 days, there is a history of sexual intercourse, to check the urine or blood to rule out early pregnancy, if pregnant, 7 weeks pregnant pelvic ultrasound to find out whether it is intrauterine pregnancy and whether there is a primitive cardiac tube pulsation. If menstruation is delayed and there is no pregnancy, regulate menstruation under the guidance of the doctor. Therefore, for accurate results, patients can go to the hospital to have blood drawn to test blood chorionic gonadotropin. Women with erratic menstrual cycles can determine whether they are pregnant or not by taking a venous blood test for human chorionic gonadotropin levels, depending on the time of sexual intercourse. An ultrasound should be performed promptly after the diagnosis of pregnancy in order to rule out ectopic pregnancy and gestational trophoblastic disease, and to determine the size of the developing gestational sac.