Drinking beer during the preparatory period usually has no effect if the amount is relatively small; if the amount is relatively large, men may affect the quality of sperm, and women may affect the development of eggs and embryos, and the implantation of fertilized eggs. In general, if the amount of beer drunk during the preparatory period is relatively small, it usually does not have a great effect. However, if a man drinks a larger amount, the alcohol may cause acute damage to the man’s sperm and reduce the success of the preparation. If a woman drinks a relatively large amount of beer, it may also have an effect on the development of the egg, the smooth implantation of the fertilized egg and the development of the embryo. It is recommended that couples preparing for pregnancy go to the hospital for a pre-pregnancy eugenics health checkup to assess whether their bodies are suitable for pregnancy; quit smoking and drinking, develop good habits, and don’t stay up late. Moderate exercise to maintain good health, to avoid prolonged exposure to radiation or pollution in the environment, to get out of the toxic and harmful work environment; maintain a happy mood; avoid heavy physical labor. Preparation for pregnancy medication should be under the guidance of a doctor, careful selection of symptomatic drugs; women should start from 3 months before the planned pregnancy oral folic acid, to prevent neural tube defects; if the injection of vaccines should be completed in preparation for pregnancy, try not to be vaccinated during pregnancy.