Hall, John B.Whittier, W. DeeMyers, JimCline, Mark A.Cuddy, David2014-11-052014-11-052005-09-01http://hdl.handle.net/10919/50695New systems of synchronizing estrus in cows for artificial insemination have been developed using Gonadotropin Releasing Hormone (GnRH). These systems allow producers to artificially inseminate cows with little or no heat detection5 pagesapplication/pdfenIn CopyrightVirginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University.Beef cattleVeterinary medicineBeef cattle -- BreedingEstrusExtension publicationhttp://pubs.ext.vt.edu/400/400-013/400-013_pdf.pdfBeef cattleAnimal breedingEstrus