It is better to have intercourse 2-3 times a day during the preparation period. Do not have sex too often during this period, as it may lead to a decrease in sperm quality, which may reduce the chance of conception. During the preparation period, you should pay attention to strengthening nutrition and physical fitness. The male partner should eat more high-protein foods and foods containing zinc, which are good for improving sperm quality. For those who have difficulties in conceiving for a long time, try to have intercourse around the time of ovulation, do not get out of bed early after ejaculation or go to the toilet, and try to raise your hips to facilitate the entry of sperm into the uterus. Supplementation of folic acid, 1 tablet per day, can prevent neural tube abnormality and premature birth of the fetus.