The male developmental period is puberty, which on average ends around 18-20 years of age. The beginning of the male developmental period is from 11-13 years old. The earliest sign of development is the enlargement of the testicles, which marks the beginning of puberty, and the level of sex hormones also changes a lot, special development of the male penis and pubic hair occurs, the voice starts to become low, and there are obvious differences in appearance with women, such as the widening of the shoulders and stronger muscle development. The male reproductive capacity is also close to that of an adult at this stage, with seminal emission and mature reproductive organs and ability. Men during the growth period should have balanced nutrition, reasonable diet, pay more attention to rest, avoid staying up late, do not smoke, drink alcohol, drink less carbonated beverages, exercise properly, promote blood circulation, and eat more food with high calcium content, such as fish and shrimp.