When preparing for pregnancy, men need to conduct physical examination to determine whether there are adverse factors affecting pregnancy, and also need to make adjustments to their lifestyle and dietary structure. 1. Physical examination: generally have urine routine, semen examination, infectious disease examination and so on many items, to detect male sperm, urinary system is normal, if there are abnormalities timely treatment. 2. Lifestyle: Men should actively exercise to improve their immunity, which is conducive to improving the quality of sperm. Regular work and rest, quit smoking, quit drinking, can promote the vitality of sperm, is conducive to the preparation for pregnancy. 3. Dietary structure: men should eat more food with high protein content in daily life, supplement vitamins and fiber, and avoid eating cold and greasy food. It is recommended that men prepare for pregnancy for about three months to half a year, which is conducive to creating a good environment for sperm, and consult a doctor in time when there are abnormalities, so as not to delay the condition.