Relationship between the side of pregnancy and side of subsequent ovarian activity during the early postpartum period in lactating dairy cows

The Journal of Reproduction and Development
Hiromi KusakaMinoru Sakaguchi

Abstract

After parturition, the ovary ipsilateral to the side of previous pregnancy exhibits lower functional activity than that exhibited by the contralateral ovary. The local inhibitory effects of the corpus luteum of the previous pregnancy, and/or the presence of a previous gravid uterine horn, may induce the ipsilateral suppression of folliculogenesis. We examined the influence of the side of previous pregnancy on ovulation and folliculogenesis, until completion of the third postpartum ovulation. The ovaries of 30 Holstein cows were scanned by ultrasonography, through the three postpartum ovulation sequences. No significant differences in the development of growing follicles, 5-8 mm in diameter, were detected between ipsilateral and contralateral ovaries. However, the total number of dominant follicles emerging ipsilaterally before the second postpartum ovulation were less than those emerging contralaterally (25 vs. 75%), and both the first and second ovulation occurred less frequently on the ipsilateral versus contralateral side (23 vs. 77% and 27 vs. 73%, respectively). Sequential observation in this study clearly indicated that the influence of the side of previous pregnancy persisted until the second postpartum ovulation, and th...Continue Reading

References

Mar 1, 1990·Journal of Reproduction and Fertility·J D SavioJ F Roche
Jul 1, 1988·Journal of Reproduction and Fertility·J D SavioJ F Roche
Jan 1, 1985·Journal of Reproduction and Fertility·J J Dufour, G L Roy
Nov 1, 1967·Journal of Dairy Science·S SaiduddinL E Casida
Aug 1, 1968·Journal of Reproduction and Fertility·W D Foote, D W Peterson
May 1, 1995·Research in Veterinary Science·S McDougallN B Williamson
Nov 1, 1996·Journal of Reproduction and Fertility·O J GintherM C Wiltbank
Jun 8, 2002·Reproduction : the Official Journal of the Society for the Study of Fertility·I M SheldonH Dobson
Aug 26, 2004·Journal of Dairy Science·M SakaguchiY Yamada
Feb 22, 2017·Theriogenology·Hiromi KusakaMinoru Sakaguchi

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