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To assess whether elevated levels of estriol (E3)inpregnancy are a factor in the fetal environment associated with undescended testes, we carried out a two-part study: case-control followed by a retrospective cohort study on cryptorchid boys born in the Sapir Medical Center (Kfar Saba, Israel). We found significantly lower pregnancy urinary E3 levels in cryptorchid newborns as compared to controls; however, subgroup comparison yielded significantly higher pregnancy unconjugated E3 levels in the infants who underwent orchiopexy as compared to those who did not.
To assess whether elevated levels of estriol (E3) inpregnancy are a factor in the fetal environment associated with undescended testes, we carried out a two-part study: case-control followed by a retrospective cohort study on cryptorchid boys born in the Sapir Medical Center (Kfar Saba, Israel). We found significantly lower pregnancy urinary E3 levels in cryptorchid newborns as compared to controls; however, subgroup comparison yielded significantly higher pregnancy unconjugated E3 levels in the infants who underwent orchiopexy as compared to those who did not.