In general, the sperm formation cycle is about 3 months. The exact time of sperm formation varies due to the differences in individual constitution. For those with strong spermatogenesis, the formation cycle takes about 70 days. If sperm production is poor, the formation cycle may take more than 90 days. Due to the differences in the physical condition of individuals, the exact time required will also be different. To improve the quality of sperm, men are advised to strictly control their diet and rest time. Usually quit smoking and drinking, try not to wear tight pants, avoid sitting for a long time, pay attention to personal hygiene, strengthen exercise and keep a good mindset. To summarize, personal constitution and living habits will have some influence on the formation of sperm, as long as the fluctuation of the cycle will not be too big, all do not need to worry too much. However, if there is physical discomfort or the presence of disease effects, you should seek medical attention in a timely manner, so as not to delay the condition, resulting in adverse effects.