There are three main clinical methods to check for pregnancy. The first is a urine pregnancy test to determine if conception has occurred. Second, a blood chorionic gonadotropin test to determine if pregnancy has occurred. The third is an ultrasound to determine if conception has occurred and to determine if the pregnancy is intrauterine or extrauterine. These tests will ultimately determine whether or not the patient is pregnant. If the patient has delayed menstruation, accompanied by nausea and vomiting, excluding other causes of gastrointestinal discomfort, and if the patient also has weakness, drowsiness and breast tenderness, the possibility of pregnancy should be highly suspected. If the patient measures the basal body temperature, and the basal body temperature rises after ovulation and is maintained for more than 16 days, the possibility of pregnancy is very high, and if it is maintained for more than 20 days, pregnancy is basically confirmed.