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The effect of an intravenous infusion of gonadotrophin releasing hormone (GnRH) on the duration of postpartum anestrus in suckled beef cows was studied. Twenty-eight, mature, suckled beef cows were assigned in equal numbers to one of four treatment groups which were based on infusion with saline or ...
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All current approaches to manipulating the reproductive biology of the nonpregnant mare are discussed.
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Blood and urine samples collected from 12 mares at frequent intervals from 25 to 210 d of pregnancy were analyzed for equine chorionic gonadotropin (eCG). Blood and urine samples were collected daily through two consecutive ovulatory periods from five cyclic mares for comparative purposes. Separate ...
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A stunted Miniature American Eskimo bitch that had signs of proestrus, which persisted for almost 8 months, had a 77,XO karyotype. Despite signs of proestrus, the ovaries were small and fibrous, and there was no evidence of ovarian follicle development or corpora lutea. Except for its juvenile appea...
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A review..
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During early springtime, ewes were treated with a single injection of PMSG (500 IU) administered at the time of progesterone sponge withdrawal (Group I) or four, twice daily injections of FSH (2 mg each) administered from twelve hours before, to 24 hours after sponge withdrawal (Group II). One hundr...