Ovulation refers to the time period when eggs are released from a woman's body, usually about 14 days before her next menstrual period. For some women, they may release one egg every month relatively regularly, so their ovulation time during the ovulation period is relatively stable. However, for some women, they may encounter factors that make it difficult for them to accurately predict ovulation. So, what do they need to do to ensure they have intercourse at the right time?

1. Measure basal body temperature: A woman can understand her health status and menstrual cycle by measuring her basal body temperature. Basal body temperature refers to the body temperature measured when a woman wakes up in the morning and has not yet performed any activities. Women can measure their basal body temperature at the same time every day and record it in a form. By analyzing a woman's basal body temperature, a woman can learn about her menstrual cycle and when she might be ovulating.

2. Observe vaginal discharge: A woman can learn about her health and menstrual cycle by observing vaginal discharge. Vaginal discharge usually refers to the fluid secreted by the vaginal mucosa in women. Women can observe vaginal discharge at the same time every day and record it in a form. By analyzing a woman's vaginal secretions, a woman can learn about her health and when she is likely to be ovulating.

3. Conduct B-ultrasound monitoring: A woman can understand her health status and menstrual cycle through B-ultrasound monitoring. B-ultrasound monitoring means that women use B-ultrasound equipment to observe women's uterus, ovaries, fallopian tubes and other organs under the guidance of a doctor. Through B-ultrasound monitoring, a woman can understand her health status and when she is likely to enter ovulation.