Effects of parity on uterine involution and resumption of ovarian activities in postpartum Chinese Holstein dairy cows

27Citations
Citations of this article
62Readers
Mendeley users who have this article in their library.

Abstract

Favorable uterine involution and ovarian activity are very important for the next reproductive cycle of postpartum cows. The objective of this study was to evaluate the effect of parity on uterine involution and resumption of ovarian activity in Chinese Holstein dairy cows after calving under similar postpartum nutritional conditions. Traits of the status of uterus and ovaries detected by ultrasonography, dry matter intake (DMI), milk yield, body condition score (BCS), and estradiol concentration in milk samples were analyzed for 46 Chinese Holstein dairy cows in various parities (primiparous=18; biparous=13; multiparous=15). The results showed that there was no significant difference for DMI, BCS, and milk yield among different parities; all cows were considered to be under similar nutritional conditions. Days of the previous gravid uterine horn involution were significantly greater in primiparous dairy cows than in biparous and multiparous dairy cows. Days from calving to ovulation (first and second) and the number of follicular waves to first ovulation were significantly greater in primiparous cows than in multiparous cows. In summary, there was a significant negative relationship between parity and postpartum uterine involution and resumption of ovarian activity in Chinese Holstein cows under similar body conditions. © 2010 American Dairy Science Association.

Cite

CITATION STYLE

APA

Zhang, J., Deng, L. X., Zhang, H. L., Hua, G. H., Han, L., Zhu, Y., … Yang, L. G. (2010). Effects of parity on uterine involution and resumption of ovarian activities in postpartum Chinese Holstein dairy cows. Journal of Dairy Science, 93(5), 1979–1986. https://doi.org/10.3168/jds.2009-2626

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free