Under normal menstruation, a woman’s ovulation period is counted from the first day of her next menstrual period, counting down 14 days to the day of ovulation, and the five days before and the four days after the day of ovulation together are called the ovulation period. However, ovulation is related to the usual menstrual cycle, and ovulation is also uncertain. It is recommended to determine the ovulation period by ultrasound monitoring, ovulation test paper monitoring and so on. 1. Ultrasound monitoring: ultrasound monitoring of ovulation is relatively accurate, but requires continuous dynamic monitoring, generally waiting for the follicle to develop to the advantage of arranging intercourse, but also need to do ultrasound again to double-check whether the follicle is discharged. 2. Ovulation test paper monitoring: you can use ovulation test paper every day for continuous monitoring, observe the changes in the test paper, such as strong positive more suggestive of ovulation, from strong positive to weak positive, more suggestive of ovulation. If you want to determine the ovulation period, it is recommended to go to the hospital, in the doctor’s interview after the examination of the relevant items, according to the results of the examination to determine the ovulation period.