Early postpartum luteal function after treatment with progestin and(or) gonadotropin-releasing hormone in dairy cattle

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dc.contributor.author Mee, M.O.
dc.contributor.author Stevenson, Jeffrey S.
dc.date.accessioned 2012-09-20T19:26:35Z
dc.date.available 2012-09-20T19:26:35Z
dc.date.issued 2012-09-20
dc.identifier.uri http://hdl.handle.net/2097/14712
dc.description.abstract Progestin (Norgestomet®) and(or) repeated low-dose infusions of GnRH (Cystorelin@) influenced the lifespan of the first corpus luteum after an induced ovulation. Holstein cows (n=32) were assigned at calving to four groups. Cows were treated with blank ear implants (days 2 to 9 after calving) and saline infusion (48 hr on days 10 arid II), progestin ear implants and saline infusion, blank implants and GnRH infusion, or progestin implants and GnRH infusion prior to a GnRH-induced ovulation (day 12). Four primiparous and four multiparous cows were assigned to each treatment. Fewer cows treated with progestin/GnRH ovulated in response to the GnRH challenge. However, short cycles (<17 days in duration) were prevented in all cows (n= 16) treated with progestin. In addition, all multiparous cows treated with blank implants and GnRH infusion had normal cycles. Results of this study suggested that progestin and GnRH may have altered follicular development, thereby preventing the short-lived corpus luteum and inducing a normal estrous cycle as cows overcame anestrus early postpartum. en_US
dc.publisher Kansas Agricultural Experiment Station en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 89-107-S en_US
dc.subject Dairy en_US
dc.subject Luteal function en_US
dc.subject Progestin en_US
dc.subject Gonadotropin-releasing hormone en_US
dc.title Early postpartum luteal function after treatment with progestin and(or) gonadotropin-releasing hormone in dairy cattle en_US
dc.type Conference paper en_US
dc.date.published 1988 en_US
dc.citation.epage 26 en_US
dc.citation.spage 24 en_US
dc.contributor.authoreid jss en_US

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