Plasma testosterone and beta HCG levels in the first twenty-four hours of life in neonates with cryptorchidism.

We determined serum concentrations of beta HCG and testosterone by specific radioimmunoassays in eight cryptorchid and 13 normal newborns in the first 24 h of life. Mean serum beta HCG concentration in the cryptorchid infants (18.9 +/- 9.7 miu/ml) did not differ significantly from the control group (26.7 +/- 7.6 miu/ml). Mean serum testosterone level in the cryptorchid newborns (271 +/- 27 ng/dl) also did not differ significantly from the control group (333 +/- 30 ng/dl). These data suggest beta HCG and testosterone concentrations on the first day of life are of the same magnitude in normal and cryptorchid infants.