Eugenics is a new concept of fertility: couples begin to prepare for conception three months, or even six months, before the union of sperm and egg, so that the conception of life is not just an October pregnancy. It is important to strive to achieve the best state of eugenics, timing and condition, so that the healthiest and most energetic sperm and egg can recombine and express the fine genes of both parents such as looks, intelligence, personality and health in the fertilized egg at the right time and right place. (1) The parents-to-be should make the following physiological preparations in order to be eugenic Both partners should be healthy and disease-free 3 months before pregnancy. Either party should not conceive if they suffer from tuberculosis, hepatitis, nephritis, and especially if the woman suffers from heart disease, diabetes, hyperthyroidism, venereal disease, or tumor. It is also necessary to wait for 3 months after recovering from the disease before conceiving. Stop drinking and put down the white “magic wand” – cigarette – 3 months before pregnancy. Be careful with medications in the first 3 months of pregnancy, including not using estrogen-containing skin care products. Couples who work in occupations that are harmful to the fetus, especially women, must leave temporarily in the first 3 months of pregnancy. Women who have been using instrumental and pharmaceutical contraceptives for a long time should stop using them for 6 months before conceiving. Do not conceive during sexual intercourse while fatigued. Women who are too fat or too thin should adjust their weight to a normal state. In order to reduce the nutritional losses caused by the “early pregnancy reaction”, it is important to actively consume nutrient-rich foods, such as those containing folic acid, zinc and calcium, during the 3 months before pregnancy. In the 3 months before getting pregnant, the female partner should eat more lean meat, eggs, fish and shrimp, animal liver, beans and soy products, seafood, fresh vegetables and seasonal fruits. The male partner should eat more eels, loach, pigeons, oysters, sparrows and leeks. Both sides should eat less ham, sausage, salted meat, pickled fish, pickled vegetables, do not eat smoked food such as lamb skewers. Also eat less canned food and drink less. Wash vegetables pay attention to the method of washing by immersion to remove residual pesticides. (2) The psychology of conception should be chosen. Have sexual intercourse with the mission of conception in a happy mood, free from depression and worries. The husband should pay attention to and allow his wife to reach orgasm, which is essential to get a healthy and intelligent child. (3) By allowing the newly expelled egg to be fertilized immediately, you can avoid the influence of the external environment and have the best chances of conceiving a child with good health and high IQ – this is euthymia.