Usually the regular menstrual cycle in the menstrual period about 10-14 days after the ovulation, in the ovulation period will increase the chances of fertilization, the menstrual cycle is not regular, there is a push back, that in the time of ovulation will also be pushed back. The time of intercourse is on the first day after menstruation, not in the ovulation period, so it will not be pregnant. It is recommended to keep a relaxed mood, avoid anxiety and tension, and listen to more soothing music. Eat more fruits and vegetables, drink more water, especially foods rich in vitamins and proteins. Usually during the menstrual period, we should pay attention to keep the pubic hygiene and clean, prohibit sexual intercourse, avoid bacteria into the pelvis, resulting in pelvic infection and congestion and other gynecological diseases.