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Full-Text Articles in Life Sciences
Effects Of Pituitary Stalk-Transection And Type Of Barrier On Pituitary And Luteal Function During The Estrous Cycle Of The Ewe, David S. Mallory, C. M. Gust, R. A. Dailey
Effects Of Pituitary Stalk-Transection And Type Of Barrier On Pituitary And Luteal Function During The Estrous Cycle Of The Ewe, David S. Mallory, C. M. Gust, R. A. Dailey
Biological Sciences Faculty Research
Effects of pituitary stalk-transection on plasma concentrations of luteinizing hormone (LH), follicle stimulating hormone (FSH) prolactin (PRL) and progesterone were investigated during the estrous cycle of ewes. Pituitary stalk (SS) or sham (SH) transection was performed on day 1 (estrus = day 0) of the estrous cycle. A Teflon or Silastic barrier was placed between the cut ends of the stalk to prevent reorganization of the portal vasculature. Immediately following surgery, pulsatile administration of gonadotropin releasing hormone (GnRH, 200 ng/hr) or .9% NaCl was initiated and continued for the duration of the experiment. Estradiol benzoate (EB, 50 μg im) …
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