It is generally recommended that women lie down for 30 minutes before going to the bathroom after intercourse during pregnancy preparation. The amount of semen that a man ejaculates into a woman’s body after intercourse during the preparation period is usually around 2~6mL, and the average number of sperms is usually more than 100 million, so whether or not a woman is active after intercourse will not affect the success rate of sperm fertilization. However, it is usually recommended to lie down for about 30 minutes, especially if some women have abnormal uterine position, such as posterior tilt and flexion, it is recommended to place the buttocks higher when lying down after intercourse, which also helps to increase the chance of fertilization. Women must rest more during the preparation for pregnancy, can not be tired, and try to choose to have sex at the time of ovulation, the chances of pregnancy will be higher.