Serum estradiol and progesterone levels of the laying turkey hen following acute treatment with mammalian luteinizing hormone or follicle-stimulating hormone
التفاصيل البيبلوغرافية
العنوان:
Serum estradiol and progesterone levels of the laying turkey hen following acute treatment with mammalian luteinizing hormone or follicle-stimulating hormone
Experiments were conducted to determine if a single intravenous injection of luteinizing hormone (LH) or follicle-stimulating hormone (FSH) would elicit an increase in serum progesterone (P) or estradiol (E) in the laying turkey. In all experiments, hens were used at 4–5 hr after oviposition when endogenous E and P were expected to be low. All E and P determinations were done by RIA. In Expt 1, hens were bled, then injected with 100, 250, 500 or 1000 μg of NIH-LH-B9 and bled again 5 and 30 min later. Increases in P were found with 100 and 500 μg of LH (P < 0.05) and 250 and 1000 μg LH (P < 0.01). E was increased by 250 (P < 0.01) and 1000 μg LH (P < 0.05). In Expt II, hens were bled, then injected with 250, 500, 750, or 1000 μg FSH-P (Armour-Baldwin Laboratories) and bled again 5 and 30 min later. P was increased by 500, 750, and 1000 μg of FSH (P < 0.01), while E levels were elevated by 250, 500, and 1000 μg FSH (P < 0.05). Therefore, the administration of either LH or FSH has a steroidogenic action on the turkey ovary eliciting rapid increases in serum P and E.
