SYNCHRONIZATION OF ESTRUS IN CATTLE BY INTRAVAGINAL APPLICATION OF PROGESTERONE WITH ESTROGEN ADMINISTRATION
نویسندگان
چکیده
منابع مشابه
Synchronization of Estrus in Cattle
Numbers of estrus synchronization programmes are available in cattle based on the use of various hormones like progesterone, prostaglandin F2a and their various combinations with other hormones like estrogen and Gonadotrophin Releasing hormone (GnRH). Selection of appropriate estrus synchronization protocol should be made on the basis of management capabilities and expectations of the farmer. S...
متن کاملControl of estrus and progesterone levels in heifers given intravaginal progesterone coils and injections of progesterone and estrogen.
Fifty-three mature Hereford-cross heifers, which were between day 0 and 3 of the estrous cycle, each had silastic coils containing 2.1 g progesterone inserted into the vagina where they remained for 12 days. Animals were assigned to treatment groups and were injected with (1) 5 mg estradiol benzoate, (2) as (1) + 50 mg progesterone or (3) as (1) + 200 mg progesterone at the time of insertion of...
متن کاملResynchronization of estrus in cattle of unknown pregnancy status using estrogen, progesterone, or both.
Our objective was to develop treatments applied to cattle of unknown pregnancy status that would resynchronize the repeat estrus of nonpregnant females. In Exp. 1, previously inseminated dairy and beef heifers were assigned randomly to each of three treatments 13 d after AI: 1) no treatment (controls; n = 44); 2) 0.5 mg of estradiol cypionate (ECP) i.m. on d 13 and 20 at the time of insertion a...
متن کاملA review of synchronization of estrus in postpartum cattle.
Estrus has been synchronized in cattle with progestogens, prostaglandins (prostaglandin F2 alpha and its analogues), progestogen-estrogen combinations and progestogen-prostaglandin combinations. Progestogens administered for 14 to 20 d are effective in synchronizing estrus; however, fertility at the synchronized estrus is subnormal. Duration of progestogen treatment can be reduced by combining ...
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ژورنال
عنوان ژورنال: Canadian Journal of Animal Science
سال: 1971
ISSN: 0008-3984,1918-1825
DOI: 10.4141/cjas71-036