Hypothalamic gonadotrophin-releasing hormone and pituitary and plasma FSH and prolactin during photostimulation and photorefractoriness in intact and thyroidectomized starlings (Sturnus vulgaris).

@article{Dawson1985HypothalamicGH,
  title={Hypothalamic gonadotrophin-releasing hormone and pituitary and plasma FSH and prolactin during photostimulation and photorefractoriness in intact and thyroidectomized starlings (Sturnus vulgaris).},
  author={A Dawson and B. Follett and Arthur R. Goldsmith and Thomas J. J. Nicholls},
  journal={The Journal of endocrinology},
  year={1985},
  volume={105 1},
  pages={71-7}
}
Changes in concentrations of hypothalamic gonadotrophin-releasing hormone (GnRH) and pituitary and plasma FSH and prolactin were measured in intact and thyroidectomized female starlings (Sturnus vulgaris) after transfer from short to long photoperiods. In intact birds, hypothalamic GnRH did not increase significantly during the first 6 weeks of photo-stimulation, but by 12 weeks, as birds became photorefractory, it had decreased to levels significantly lower than those before photostimulation… CONTINUE READING
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