The vaccine has no effect on pregnancy and men can have children immediately without delaying the preparation for pregnancy if there are no adverse effects. There are no studies showing that vaccination of males has adverse effects on spermatozoa, and men who are pregnant are not contraindicated for vaccination. Therefore, men can prepare for pregnancy normally after vaccination, but it is recommended to strengthen the follow-up during pregnancy. It should be noted that the new crown vaccination should be left half an hour, if there is fever, redness and swelling at the site of vaccination, allergies and other phenomena should be promptly informed to the doctor, if there is a serious adverse reaction that requires special treatment, you can consult the doctor whether it has an impact on the preparation for pregnancy, if there is no impact, you can prepare for pregnancy normally. After inoculation, we should pay attention to avoid spicy and stimulating food, and actively exercise to improve physical fitness and help improve sperm quality.