In cryptorchidism, early surgery is now mostly advocated. For full-term infants, 6 months after birth is the observation period, and some children’s testicles will descend to the scrotum on their own. For cryptorchidism that has not descended for more than 6 months, early surgery is generally recommended to reduce the damage of testicular function. For premature babies, the time of testicular descent may also be delayed, so the observation period can be extended accordingly, especially for cryptorchidism in a lower position, it can be observed until 1 week of age before surgery. However, even if some cryptorchid testes descend to the scrotum on their own during infancy, they need to be observed for follow-up because it is found that there are some children whose testes will rise again to become cryptorchid as they get older!