J. Anim Sci.
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J. Anim Sci. 1968. 27:466-467.
© 1968 American Society of Animal Science
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Similarity in the Number of Corpora Lutea during Two Stages of Pregnancy in Swine1

D. E. Longenecker, A. B. Waite and B. N. Day

Missouri Agricultural Experiment Station2, >Columbia

Abstract

The corpora lutea present in the ovaries of 30 gilts at 3 days after mating were marked with charcoal or India ink. The animals were slaughtered on day 40 of the gestation period and counts were made of marked and unmarked corpora lutea. Four of 339 corpora lutea marked at laparotomy were not detected on the 40th day of gestation. Of a total of 343 corpora lutea present at the time of slaughter, 2.3% were unmarked. In this study, the number of corpora lutea present on the 40th day of pregnancy provided a useful estimation of ovulation rate at time of breeding with a minimal error.

Footnotes

1 Contribution from Missouri Agricultural Experiment Station. Journal Series No. 5201. Approved by the Director.

2 Department of Animal Husbandry.






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Copyright © 1968 by the American Society of Animal Science.