Reproductive performance of lactating dairy cows treated with cloprostenol at the time of insemination

Theriogenology
F López-GatiusM López-Béjar

Abstract

The effect of intravenous cloprostenol treatment at the time of insemination on reproductive performance was consecutively evaluated in three different subpopulations of high producing lactating dairy cows: Study (1) early postpartum synchronized and fixed-time inseminated (about 50 days in milk) cows (n = 379: 187 control and 192 treated cows); Study (2) presumed high fertility cows first inseminated between 90 and 120 days postpartum (n = 248: 124 control and 124 treated cows); and Study (3) heat stressed repeat breeder cows (n = 183: 93 control and 90 treated cows). Data were analyzed using multiple regression methods. Study 1: Parity (primiparous versus multiparous), milk production, body condition score at AI, insemination season (cool versus warm period) and treatment were included in the analysis as potential factors affecting ovulation, double ovulation, return to estrus, and pregnancy to first AI and to second AI (first AI plus return AI) rates. Logistic regression analysis indicated that the final model for ovulation rate only included the interaction (P = 0.002) between insemination season and treatment. Cloprostenol treatment at insemination led to a 4.2-fold increase in the ovulation rate in cows inseminated during...Continue Reading

References

Aug 1, 1991·Zentralblatt für Veterinärmedizin. Reihe A·F López-Gatius, J Camón-Urgel
May 1, 1981·Journal of Reproduction and Fertility·D T Armstrong
Mar 29, 2000·Theriogenology·P M Fricke, M C Wiltbank
Jun 14, 2000·Animal Reproduction Science·W R Butler
Aug 22, 2001·Biology of Reproduction·L J KulickO J Ginther
Feb 15, 2003·Animal Reproduction Science·P J Rajala-Schultz, G S Frazer
Jun 24, 2003·Animal Reproduction Science·O J GintherD R Bergfelt
Nov 1, 1989·Theriogenology·M NielenA Brand
Nov 1, 1995·Theriogenology·J R PursleyM C Wiltbank

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Citations

Feb 6, 2009·The Journal of Reproduction and Development·Johannes KauffoldAxel Wehrend
Feb 24, 2005·Theriogenology·F López-GatiusR H F Hunter
Mar 17, 2010·Theriogenology·Muhammad YusufAki Hayashi
Jul 25, 2007·Journal of Pharmaceutical and Biomedical Analysis·Kveta KalíkováZuzana Bosáková

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