It is normal for the testicles to remain undescended in newborns. Most boys will have their testicles descend into the scrotum within three months, but if they do not descend into the scrotum after three months, there is a possibility of cryptorchidism or other disorders. Generally speaking, the testicles descend into the scrotum around seven to nine months of fetal life, but there are some boys whose testicles descend into the scrotum within one to three months of birth, and if they continue to fail to descend into the scrotum, they need to be treated promptly. It is worth noting that if the testicles do not descend to the scrotum (after one year of age), it may be due to a disease such as cryptorchidism, which needs to be examined in time and treated (both medically and surgically) under the guidance of a specialized doctor. Newborns with undescended testicles can be examined regularly and closely monitored under the guidance of a doctor, and treated promptly if there is any special condition.