Usually, women are more likely to conceive when they lie on their backs and raise their hips during intercourse, as this position makes the semen less likely to flow out of the vagina. It is also easier for women to conceive when they have intercourse during ovulation. Ovulation usually occurs between 4 days before and 5 days after the 14th day before the next menstrual period, which increases the chances of pregnancy. Normally, it takes about half an hour for the semen to liquefy. Therefore, women who plan to get pregnant need to raise their hips in a supine position, such as a soft pad or a small pillow of suitable thickness under the hips, so that the ejaculated semen can be concentrated in the posterior vaginal fornix, and rest for 2 hours after intercourse before getting up. In addition, in addition to quitting smoking and drinking during the preparation period, couples should also pay attention to stay away from the radiation environment and maintain a relaxed mood.