The main methods to determine ovulation include: 1, follicle monitoring under B ultrasound: the most accurate method should be to do follicle monitoring with B ultrasound to determine whether the follicles are growing; 2, LH test paper: some patients may find it troublesome to go to the hospital, so they can do ovulation determination at home with ovulation test paper. The common ovulation test paper at present is luteinizing hormone test paper, also known as LH test paper, which will rise when ovulation is approaching, so you can use LH test paper to determine whether ovulation is going to occur; 3, observation of leucorrhoea: you can determine whether ovulation is going to occur by observing some leucorrhoea, which is stretched or thinner; 4, time projection: generally, the next menstrual period is projected 14 days ahead, which is the ovulation day of women with normal menstrual cycle. At this time, you can also test the test paper to see if the LH turns into a bright color to determine if there is ovulation. Women generally ovulate only once a month, so ovulation monitoring is very important. In general, if a woman does not detect ovulation through the above methods, it means that she is not ovulating this month, so she should go to the hospital and apply relevant medication for intervention.