In women with regular periods, the middle of the menstrual period is the ovulation period. Assuming that you have your period on the 2nd and your menstrual cycle is 30 days, you will ovulate around the 17th, 4 days before and 3 days after the day of ovulation, which is a period of 8 days, is the ovulation period. If you are ready to get pregnant, you can arrange reasonable sex during the ovulation period, and the chances of getting pregnant during this period are higher. If you are not ready to get pregnant, you should use proper contraception if you have sex during the ovulation period. In addition, if menstruation is delayed, the day of ovulation will also change, and the ovulation period will follow. Ovulation is clinically calculated when menstruation is regular. In the case of women with irregular periods, the ovulation period calculated by this method may deviate. In addition, women can use ovulation test paper or ultrasound to monitor ovulation and arrange reasonable sex life to increase the probability of pregnancy.