The fertile period is the time in the menstrual cycle when it is easier to conceive. For women with regular menstruation and a menstrual cycle of about 30 days, the ovulation day is around the 14th day before the next menstrual period. You can detect the ovulation day by ovulation test paper and go to the hospital for ultrasound to check the follicle development to determine the ovulation day, which is the fertile period. If you are planning to conceive, you can arrange sex or increase the number of times you have sex during the fertile period to increase your fertility rate. For women who are not planning to conceive, it is best to use safe and effective contraceptive measures during the fertile period to avoid unwanted pregnancy and artificial termination of pregnancy which is not good for health.