Fertile bodies also have a safe period, the same as other people’s safe period, but the safe period is not absolutely safe. Fertile body may be a woman with regular menstruation, normal ovulation, or the uterus is positioned more forward, this situation is more likely to conceive than other women, and the safe period are referred to 3 days before ovulation and 5 days after ovulation, and outside of the menstruation period are considered as the safe period. The egg can only be fertilized after combining with the sperm, if there is no ovulation can not be fertilized, easy to conceive body is only women in the reproductive age, ovulation is normal, or the uterus is easy to get pregnant by the front, but there is still a safe period. It should be noted that the safe period is not absolutely safe, there is still a certain chance of pregnancy. Women with fertility needs are advised to go to the hospital for a pre-pregnancy eugenics health checkup to assess whether their bodies are suitable for pregnancy; quit smoking and drinking, develop good living habits, maintain good health, and avoid prolonged exposure to radiation or polluted environments. Women who do not have a need to have children should pay attention to good contraceptive measures, avoid the safe period contraceptive method, and preferably use condoms to prevent pregnancy.