Comparison of Serum Hormone Titers in Golden Hamsters During Testicular Growth Induced by Pinealectomy and Photoperiodic Stimulation1
- 1 October 1980
- journal article
- research article
- Published by Oxford University Press (OUP) in Biology of Reproduction
- Vol. 23 (4), 893-898
- https://doi.org/10.1095/biolreprod23.4.893
Abstract
Testicular growth and changes in levels of circulating follicle-stimulating hormone (FSH; follitropin), luteinizing hormone (LH; lutropin), prolactin (PRL) and androgens, were compared in intact and pinealectomized hamsters exposed to short (6L:18D) [6 h of light:18 h of dark] or long (14L:10D) days. Testicular growth induced by long days and/or pinealectomy proceeded at the same rate. In all groups an increase in serum FSH preceded testicular growth by 2 wk, while increased serum PRL titers occurred simultaneously with testicular growth. Serum LH and androgens were also increased during testicular growth; androgen levels in animals exposed to long days were consistently greater than in males exposed to short days.This publication has 15 references indexed in Scilit:
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