Preparing for pregnancy before the boys need to pay attention to quit smoking and alcohol, moderate exercise, semen examination, etc., need to be specifically analyzed. 1. Quit smoking and drinking: tobacco and alcohol will have a negative impact on the production of sperm through the bloodstream, so men who are preparing for pregnancy need to quit smoking and drinking to prevent chromosomal abnormalities in the sperm. 2. Moderate exercise: Men should exercise moderately to improve their physical quality. 3. Conduct semen examination: In order to clearly determine the quality of sperm, it is necessary to conduct routine semen examination to observe the activity of sperm and the number of sperm, if the examination is normal, then the chances of success in preparing for pregnancy are higher. When a man needs to prepare for pregnancy, it is recommended that both husband and wife go to the hospital at the same time to consult the doctor about the preparations that need to be made, and if there are any other questions, it is recommended to consult a professional doctor for guidance.