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Control of Luteal Function and Implantation in the Mink by Prolactin^{1 ,2 ,3,}

US Department of Agriculture and Cornell University, Ithaca, NY 14853

Abstract

Mink (Mustela vison) were treated during the period of embryonic diapause with prolactin or ergocryptine (CB-154). Prolactin advanced implantation time and hastened onset of luteal phase progesterone secretion. Duration of gestation in prolactin-treated adult mink was shorter than that of control mink. Ergocryptine had the opposite effects, prolonging gestation and inhibiting onset of luteal phase progesterone secretion. Prolactin is suggested to be the luteotrophin necessary for termination of embryonic diapause in mink.

¹ This research was supported by the Mink Ranchers Research Foundation.

² Request reprints from P. Concannon, Dept. of Physical Biol., New York State College of Vet. Med., Cornell Univ., Ithaca, NY 14853.

³ The authors gratefully acknowledge Mr. Thomas Pilbeam, for his technical assistance; Mr. William Gardner, Sr. and Mr. Patrick Burke, for animal care, and Dr. Elizabeth Oltenacu, for statistical advice. The CB-154 was provided by Sandoz Laboratories.

⁴ Dept. of Anim. Sci. Present address: Sec. of Neurobiol. and Behav., Cornell Univ., Ithaca, NY 14853.

⁵ US Sheep and Fur Animal Exp. Sta., SEA, Cornell Univ., Ithaca, NY 14853.

⁶ Section of Physiol., Cornell Univ., Ithaca, NY 14853.

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