Effects of castration on serum luteinizing hormone and follicle stimulating hormone concentrations in male guinea pigs/

Croix, D.

Journal of Reproduction and Fertility 51(1): 149-152

1977


ISSN/ISBN: 0022-4251
Accession: 005294272

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Abstract
The LH levels rose quickly until 10 days, then fell before increasing again more slowly. At 92 days the serum FSH levels were 11.8 times greater (P < 0.001) in the castrated than in the non-castrated animals of the same age. The distinct dissociation of serum LH and FSH concentrations which was observed in the guinea pig during the estrous cycle, after birth and after castration suggest specific, independent regulation of the secretion of each hormone. This double regulation might take place by means of hypothalamic activity through the existence of 2 different releasing factors.