Do men need to check sperm before marriage?

Male premarital check-up includes mandatory items and optional items. Mandatory items include: first, legal infectious diseases, such as AIDS, gonorrhea, syphilis, hepatitis B, etc., are checked through blood sampling; second, serious mental diseases, such as severe mania, schizophrenia, etc.; third, reproductive system abnormalities, such diseases may directly affect fertility; fourth, genetic congenital diseases, such as albinism, primary epilepsy, etc.; fifth, blood, urine routine. Optional items include: Lung function, heart function, blood sugar, blood pressure. B ultrasound, etc., can see that semen examination is not a mandatory item, but if there is a reproductive preparation requirement, sperm can be examined before preparation.