Drinking alcohol once in a while does not affect sperm. Sperm are not as fragile as you might think, and drinking once in a while will not affect them, kill them, or cause sperm malformations. However, if you drink alcohol for a long time and drink a lot of alcohol, it will cause chronic damage to sperm. If you need to prepare for pregnancy, you need to abstain from alcohol for more than three months and take some time to metabolize all the damaged sperm before preparing for pregnancy to ensure the normal development of your baby. Before preparing for conception, a routine semen examination can be performed to check sperm activity, malformation rate and other indicators to ensure that there are no problems with sperm quality before conception. So drinking alcohol once in a while will not have any effect on sperm, so don’t have too much psychological burden. In addition, men can eat more foods containing zinc during the preparation period, which can promote sperm development and improve sperm quality.