Preparing for pregnancy in advance is indispensable for eugenic conception and laying a good genetic foundation. The couple needs to adjust their physiological and psychological state before conception in order to meet the “seed” and make efforts to conceive a good fetus. (1) Be careful with your diet, adjust your lifestyle and develop good habits. In the first three months of pregnancy, first of all, we should pay attention to diet diversification, strengthen reasonable nutrition, nourish the essence to create favorable material conditions for both men and women to generate good sperm and eggs. Secondly, try not to stay up late, quit smoking and drinking, go to bed early and get up early. According to their preferences, the necessary physical exercise according to local conditions, such as jogging in the morning, the couple play badminton, evening walks, breathing fresh air, in order to enhance physical fitness, maintain and develop a good lifestyle habits. (2) continue to deepen the feelings of the couple. The family’s peaceful and happy atmosphere, couples often strengthen the exchange of feelings, can make love deepen, so that the wife has a sense of happiness, security and a sense of belonging. This is very beneficial to stabilize the wife’s mood and cultivate a good state of mind: coupled with a harmonious and satisfying sex life, the wife’s mental and emotional state is relaxed and happy, optimistic and relaxed, which is conducive to the wife’s discharge of high quality eggs. (3) Pre-determination of ovulation. The pre-pregnancy measurement of ovulation, mastering the regularity of ovulation, will bring considerable benefits to the future arrangement of the couple’s sex life, and obtain sexual pleasure. (4) Pay attention to improving the quality of sex life. Before ovulation, you should plan to reduce the number of sexual intercourse to ensure the quantity and quality of sperm. And, before and after ovulation, try to strive for a good mood when having sex, and put your whole body and soul into it, so that the woman can reach orgasm more smoothly, in order to prompt the uterus to contract and lift up, and the posterior vaginal vault to form a larger pool of semen, so that there is more contact between the cervical opening and the semen pool, and more, high-quality sperm swim to the uterus and to the fallopian tubes. (5) Avoid damage from undesirable disturbing factors. The egg is most vulnerable to drugs and other factors during the 14 days from the primary oocyte to the mature egg, so the woman should not take general medication, drink large amounts of alcohol, or be stimulated by undesirable factors such as X-rays and toxic chemicals during the first 20 days of pregnancy. Because of the slow excretion of internal contraceptive drugs, women who use contraceptive pills for birth control, or who have been taking them for a long time due to illness of one of the spouses should start to stop taking them at 6 months before pregnancy. Especially those men and women who work in a heavily polluted environment such as chemical should leave such an environment in advance to avoid damage to sperm and eggs. (6) Choose the time to get pregnant. If you have just experienced a miscarriage or premature birth, you should stop for a year before getting pregnant so that the uterus has a chance to recuperate; if you originally used a birth control ring to prevent pregnancy, you should remove the ring 3 months before you get pregnant so that the endometrium can recover to better assume the responsibility of conceiving an embryo. (7) Learn about pregnancy and fertility and other sexual knowledge in advance. The couple should learn about pregnancy and childbirth and other sexual knowledge and knowledge of fetal education, do not believe in the old ideas and pregnancy myths circulating in society, but believe in science and seek advice from experienced people.