نوع مقاله : مقاله مروری
نویسندگان
1 دانشجوی کارشناسی ارشد فیزیولوژی دام، گروه علوم دامی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران ، کرج، ایران
2 استاد تمام فیزیولوژی دام، گروه علوم دامی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران
3 استاد تمام ژنتیک و اصلاح نژاد دام، گروه علوم دامی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Early diagnosis of Pregnancy is one of the influential factors in reproductive management. Nowadays, various methods such as rectal touch and ultrasound as well as blood sampling can be achieve this goal, but due to the diagnosis of these methods on different days after insemination, the effect of early diagnosis of pregnancy in the management of reproduction of dairy cows is obvious. Early diagnosis pregnancy reduces open days and allows farmer to be informed to distinguish between pregnant and non-pregnant cows. Early diagnosis of pregnancy and estrus is particular importance because, early diagnosis of pregnancy and estrus promptly identifies non-pregnant cows and attempts to re-fertilize them in the herd. Weakness in early diagnosis pregnancy and estrus in a timely manner causes many estrus to be lost during the economic life of cow and due to increase the open days and calving distance in the herd. Therefore, the aim of this study was to present the effects of early diagnosis of pregnancy on reproductive management of dairy cows and increase the profitability of dairy cattle herds.
کلیدواژهها [English]