Normative values for testicular descent from infancy to adulthood.

Measurements of testicular descent and volume were performed on 100 newborns and 144 older children and adults. Mean values of testicular descent were determined for age as well as for Tanner pubertal stage, establishing normative values. We later used these normative values for testicular descent to evaluate subjects who had undergone treatment for cryptorchidism many years previously. These normative values are useful both for the evaluation and follow-up of cryptorchid, suboptimally descended, and retractile testes, as well as for the evaluation and follow-up of therapy, and may prove especially useful in the decision for therapeutic intervention with suboptimally descended testes.