The calculation of a woman’s ovulation period depends on her menstrual cycle. When a woman has regular menstruation, ovulation is counted from the first day of her next period, with the 14th-16th day counting down to the day of ovulation. The five days before and four days after the ovulation day are the ovulation period. Having intercourse during the ovulation period will increase the chances of conception. For those who have irregular menstruation, such as abnormal days of menstruation, ovulation cannot be accurately estimated by simple date projection, so other methods can be used to monitor ovulation, such as basal body temperature measurement and ovulation test strips. Usually, during ovulation, a woman’s basal body temperature will rise by 0.3℃-0.5℃. A woman can measure her basal body temperature by placing a thermometer under her tongue every day after waking up, and then continuously measure and record her temperature for a month to observe her ovulation period. In addition, when a woman is close to ovulation, the secretion of cervical mucus increases due to the increase of estrogen level in her body, and its thin, elastic and stretched shape can indicate ovulation. In addition, women should pay attention to the hygiene and cleanliness of their pubic area in daily life, wash and change their underwear regularly, and prohibit sexual intercourse during menstruation to avoid the occurrence of gynecological diseases.