When preparing to have a child men should adjust their lifestyles appropriately to prepare for a healthy baby. First of all, do not smoke, drink alcohol, three months in advance to quit, because the nicotine in cigarettes and alcohol have an impact on sperm vitality. Secondly, adjust your work schedule, don’t stay up late and get up on time. Then you should exercise, combine work and rest, and be mentally relaxed and happy, which is good for spermatogenesis. And the diet should be light, do not eat spicy, stimulating food, to eat more nuts and seafood to supplement the trace elements. Sexual life should be regular, not too frequent, not too little, appropriate sexual life is conducive to the metabolism of sperm. Finally, don’t overindulge in video games, and at the same time stay away from the influence of high temperature, radiation, chemical and other dangerous working environment. In short, three months before you want to have a child, you should start to pay attention to your living and lifestyle.