Normal exercise after ovulation during the ovulation period is not relevant. Normal exercise will not affect pregnancy until the egg has formed a fertilized egg with sperm, including normal activity until the embryo is laid. After ovulation, normal running, swimming, hiking, etc. are not relevant. It is also recommended that women who are preparing for pregnancy should also do physical exercise, which will enhance their physical fitness and increase the probability of conception. During the preparation period, it is important to develop good habits, not to smoke, not to drink, and to avoid staying up late. It is also important to take folic acid to prevent fetal development malformations.