In a month, a woman's eggs will be released twice, usually on the 14th day before the next menstruation, which is the woman's ovulation period. During ovulation, a woman's egg matures and splits into two, then enters the fallopian tube to wait for fertilization under the guidance of a doctor.

A woman's menstrual cycle is affected by many factors, including genetics, environment, diet and exercise. Therefore, different women's menstrual cycles may vary, and some women may release more eggs each month, while others may release fewer eggs.

However, whether she is releasing more eggs or fewer eggs, ovulation is an important physiological period for women every month. If women don't fertilize during this period, they may try again the next month. If fertilization is successful, the fetus will be born next month.

To sum up, women have two ovulation periods in a month, on the 14th and 20th days before the next menstruation. For women who want to have children, knowing this knowledge can help them better prepare for pregnancy. For nulliparous women, understanding this knowledge can help them better manage their menstrual cycles and stay healthy.