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- ArticleGendrel D, Job JC, Canlorbe P, Roger M, Laclyde JP.Arch Fr Pediatr. 1978 May;35(5):535-45.Endocrine evaluation with LH-RH (0.1 mg/m2) and chorionic gonadotrophin (HCG 3 X 1,500 I.U.) in 154 cryptorchid boys aged 1 month to 15 years showed a decrease of LH pituitary secretion and Leydig-cells response to HCG in prepubertal and early pubertal patients. These deficiencies were positively correlated. Partial and at least transient descent of cryptorchid testis or testes has been obtained in 87 of 265 patients treated with HCG (3 to 9 X 1,500 I.U.). Plasma testosterone after HCG 3 X 1,500 I.U. was less increased in patients whose cryptorchid testis or testes descended after 9 X 1,500 I.U. than in those whose testes remained undescended. These data suggest that a partial, early and transient deficiency of pituitary LH secretion may be responsible for testicular maldescent in part of cryptorchid boys.