The process of union of sperm and egg is called fertilization or conception, and conception is the beginning of pregnancy. Pregnancy is a natural process. As long as both men and women have a normal sex life and there are no organic lesions in the reproductive system, no contraceptive measures are used during sex, and the male semen can enter the female uterus, pregnancy is possible. At the same time should do the following: 1. Prepare for pregnancy: If the male body lacks zinc, it will lead to low testosterone secretion and reduce the number of sperm, men should eat more refined meat, seafood and cereals at this time. Both men and women should supplement folic acid and vitamin B12 at the same time before conception and stay away from toxic substances. Also need to prevent and control various diseases, such as diabetes, hypertension, hyperthyroidism, etc. Pre-conception check-ups should also be conducted to implement individualized supplementation to ensure healthy fetal growth. In addition, you need to maintain a good state of mind, entertain in moderation, participate in moderate physical exercise, regular diet, etc.; 2. Seize the opportunity: generally women have an increased chance of pregnancy around the day of ovulation. For women with normal menstruation, the first day of the next menstrual period is 14 days backward to the day of ovulation, and sex before and after the day of ovulation can improve the chances of pregnancy; 3, proper posture: couples should choose the right posture for sex, and should not use artificial lubricants, which may kill sperm. It is not advisable to get up immediately after sex and lift the legs high to prevent semen from flowing out. In summary, pregnancy is not a one-time thing, couples should not be overly nervous. If all aspects are well prepared and you do not see pregnancy in 3-6 months, you can go to the hospital for help.