The rules of eugenics in China have been in place since ancient times. Are there scientific grounds for these traditions? Folk: Chinese folk since ancient times have drunk not into the room,” Thunder and lightning different room”. These statements are scientifically sound.” Alcohol does not enter the room” because alcohol in ethanol can affect the quality of sperm and eggs, thus affecting the quality of fertilized eggs, but also cause serious fetal congenital malformations.” Thunderstorms” illustrate the effects of mood swings on the quality of conception from a different perspective. If the environment is bad at conception, it will inevitably affect the couple's emotions. The changes in mood can lead to instability in the human endocrine environment, is not conducive to pregnancy. Doctor: a woman, from a physiological point of view, has an ovulatory cycle of approximately 28 days. The life of the egg is very short, only 24 hours. The sperm can live longer than 72 hours, but the opti