An Epidemiological Study on Undescended Testis

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Abstract
Of the cases of undescended testes 2/3 are bilateral. Undescended testes occur more often in the sons of less educated parents and mothers with lower qualified jobs. Cases of undescended testes at birth and true undescended testes cases may represent somewhat different nosological entities; unilateral and bilateral cases do not show any significant difference in epidemiological parameters and the pituitary and chorionic gonadotropins may have an important role in the occurrence of true undescended testes, as suggested by the season of birth.

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