In normal fetal development, during the last months of birth, the testicles develop in the abdomen and descend into the scrotum in the male fetus. Sometimes at birth, one or both testicles may fail to descend into the scrotum. If the testicle has not descended within the first year of the baby's life, surgery may be recommended to return the testicle to its proper position in the scrotum.
Review Date 1/10/2021
Updated by: Kelly L. Stratton, MD, FACS, Associate Professor, Department of Urology, University of Oklahoma Health Sciences Center, Oklahoma City, OK. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.