There are many ways to measure ovulation, the most common ones in clinical practice are as follows: First, ultrasound to check ovulation, which is the most accurate. If the patient’s menstrual cycle is 30 days, ovulation can be monitored from the 9th day of menstruation, about 3-5 times in 1 cycle. Second, monitor the basal body temperature. The basal body temperature should be monitored from the first day of menstruation and every day. Generally, the body temperature will rise 0.3-0.5 degrees within 1-2 days when ovulation occurs, which indicates ovulation. If the temperature is maintained for more than 16 days after ovulation, it indicates the possibility of pregnancy. If the temperature is maintained for more than 20 days, pregnancy is basically confirmed. Third, ovulation test paper. The use of test strips is also recommended to start testing right after the end of menstruation, and continuous testing. When a strong positive test appears, it proves that ovulation may occur and the patient can be guided to have intercourse.