Clinical report: Recovery of a degenerating 14-day embryo in the uterine flush of a mare 7 days after ovulation |
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Authors: | Hinrichs K Watson E D |
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Affiliation: | Section of Reproductive Studies New Bolton Center School of Veterinary Medicine, University of Pennsylvania 382 West Street Road, Kennett Square, PA 19348 USA. |
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Abstract: | A 15-mm diameter degenerating embryonic vesicle and a normal, 200-u early blastocyst were recovered in a uterine flush of a mare 7 d after ovulation. From its size, the degenerating vesicle appeared to be 13 to 14 d of age. The mare had been bred during a previous cycle and then treated with prostaglandin 9 days after ovulation. The advanced vesicle that was recovered suggests that a conceptus from the previous cycle continued to grow for about 5 d after prostaglandin administration, and remained in the uterus during estrus, when plasma progesterone concentrations were below 1 ng/ml. From the estimated age of the conceptus, its development stopped at about the time the mare was inseminated. Had this conceptus survived through estrus and insemination, superfetation would have occurred. |
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