%0 Journal Article %T Comparison of the effects of gonadotropin-releasing hormone, human chorionic gonadotropin or progesterone on pregnancy per artificial insemination in repeat-breeder dairy cows %A KHoramian Toosi, Babak %A Farzaneh, Nima %A Talebkhan Garoussi, Massoud %A Mohri, Mehrdad %J Research in Veterinary Science %@ 0034-5288 %D 2011