Male preparation for pregnancy usually takes about three months. Sperm are produced by the spermatogenic cells of the testes and then transported to the epididymis and then the vas deferens to the seminal vesicles. It usually takes about 70 days for a man’s sperm to mature from formation to maturity, plus the time it takes to mature in the epididymis, which takes about three months. During the period of preparation for pregnancy, men should pay attention to develop good living habits, quit smoking, quit drinking, avoid staying up late, avoid sauna, and at the same time, pay attention to the reasonable combination of diet, scientific supplementation of nutrition, and appropriate physical exercise. In addition, during the preparation for pregnancy, avoid the use of anticancer drugs, hormone drugs, antibiotics and other drugs, which may directly cause a decline in the quantity and quality of sperm.