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Biology of Reproduction, Vol 25, 295-297, Copyright © 1981 by Society for the Study of Reproduction

Postimplantation Abortion in Pine Voles (Microtus pinetorum) Induced by Strange Males and Pheromones of Strange Males

MARGARET H. SCHADLER 1

1 Department of Biological Sciences, Union College, Schenectady, New York 12308


Induction of abortion by strange males was studied in pine voles, Microtus pinetorum. Pregnant females not exposed to a strange male during the course of pregnancy will deliver their young between 24 and 26 days after insemination. When pregnant females were exposed to strange males after 10 or 15 days of pregnancy, only a small percentage (12% and 13%) delivered young sired by the original male. The remainder had aborted their litters and had new litters sired by the strange male. In experiments where pregnant females were exposed to pheromones of strange males in cage litter soiled by these males only 7% delivered litters compared with 80% of the controls.

Note:
ACKNOWLEDGMENTS The author wishes to thank Stanley Staveckis for his assistance with animal care. This study was supported in part by a grant from the New York State Science and Technology Foundation.

Submitted on February 9, 1981
Accepted on April 13, 1981






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Copyright © 1981 by the Society for the Study of Reproduction.