Gonadotropin releasing hormone therapy in functional infertility of dairy cattle.
Effects of gonadotropin-releasing hormone (GnRH) on conception rate was tested in 379 repeat-breeders in nine large dairy herds in Louisiana. Cattle with three or more services were treated intramuscularly with GnRH at the time of artificial insemination. The conception rate for the repeat-breeders treated with GnRH was significantly greater than for the controls (56 vs 40%). Furthermore, repeat-breeders that were treated with GnRH for two consecutive times at insemination resulted in a 53% increase in conception rate over the controls.
Roussel
J D
JD
Department of Dairy Science, Louisiana Agricultural Experiment Station, Louisiana State University, Agricultural Center, Baton Rouge, LA 70803, USA.
Beatty
J F
JF
Koonce
K
K