Ovulation lasts approximately 3 days. The day of ovulation is the 14th day of the menstrual period and the ovulation period is the day of ovulation plus three days before and after the day of ovulation. Ovulation in women is specific to a woman’s ability to conceive. For women of childbearing age with normal menstrual patterns and a menstrual cycle of 28 days, the day of menstruation is the first day of the menstrual cycle and the 14th day is the day of ovulation. As the egg survives in the body for 12-24 hours after being expelled, the sperm can survive for about 72 hours after entering the body. Therefore, the three days before and after ovulation have a chance of conceiving, and this period is called the ovulation period. Women who need to prepare for pregnancy can increase their chances of conception by using the ovulation period to have intercourse. In addition, women’s estrogen and progesterone levels drop slightly during ovulation, and some women may experience mood swings or a little vaginal bleeding. It is recommended that ovulating women maintain a good mood, eat a nutritious diet, work and rest regularly, and keep warm.