Alcohol definitely affects the quality of sperm, including direct and indirect effects. The direct effect is that alcohol acts locally on the testes, causing disruptions in the process of sperm production in the spermatogenic tubules, leading to a decrease in sperm quality and even causing sperm malformation, and the genetic information generated by sperm malformation is also disrupted and passed on to offspring, so many children born to excessive alcoholics usually have some hereditary So many children born to people who drink excessively often have some genetic diseases. Indirectly, alcohol can alter the level of androgens in the body, which can affect the number of sperm and also affect the seminal plasma, leading to a decrease in its quality. For patients who drink alcohol, it is usually recommended to start preparing for pregnancy after 3 months of abstinence, because sperm production is about 76 days, and the effects of alcohol on sperm are always present during this period.