Ovulation potential of human chorionic gonadotropin versus GnRH
dc.citation.epage | 33 | en_US |
dc.citation.spage | 32 | en_US |
dc.contributor.author | Buttrey, B.S. | |
dc.contributor.author | Burns, M.G. | |
dc.contributor.author | Stevenson, Jeffrey S. | |
dc.contributor.authoreid | jss | en_US |
dc.date.accessioned | 2010-11-29T17:56:32Z | |
dc.date.available | 2010-11-29T17:56:32Z | |
dc.date.issued | 2010-11-29 | |
dc.date.published | 2006 | en_US |
dc.description | Dairy Research, 2006 is known as Dairy Day, 2006 | |
dc.description.abstract | Experiments have shown human chorionic gonadotropin (hCG) to be more effective than GnRH as a means to induce ovulation of folli-cles. Dosages used, however, have differed greatly among experiments. A study was per-formed to determine the minimum effective dose of hCG needed to induce ovulation of ovarian follicles in dairy cows. Ovaries of Holstein cows were mapped by using transrec-tal ultrasonography 7 days before a bi-weekly pregnancy diagnosis. Cows were assigned randomly to treatments of saline, 100 μg of GnRH (2 mL of Fertagyl, Intervet, Inc., Mills-boro, NJ), or 500, 1000, 2000, or 3000 IU of hCG (0.5, 1, 2, or 3 mL of Chorulon, Intervet, Inc., Millsboro, NJ). Ovarian structures were monitored again 7 days later, and the propor-tion of cows, and proportion of follicles ≥ 8 mm in diameter, that ovulated were recorded. A dose of at least 1000 IU of hCG resulted in a greater ovulatory response than saline, GnRH, or 500 IU of hCG. | en_US |
dc.description.conference | Dairy Day, 2006, Kansas State University, Manhattan, KS, 2006 | |
dc.identifier.uri | http://hdl.handle.net/2097/6673 | |
dc.publisher | Kansas State University. Agricultural Experiment Station and Cooperative Extension Service | en_US |
dc.relation.isPartOf | Diary Day, 2006 | en_US |
dc.relation.isPartOf | Kansas Agricultural Experiment Station contribution; no. 07-118-S | en_US |
dc.relation.isPartOf | Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 965 | en_US |
dc.subject | Dairy | en_US |
dc.subject | GnRH | en_US |
dc.subject | hCG | en_US |
dc.subject | Ovulation | en_US |
dc.title | Ovulation potential of human chorionic gonadotropin versus GnRH | en_US |
dc.type | Conference paper | en_US |