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 کاملSynchronization of estrus in swine
Production calendars for most swine farms are based upon the reproductive cycle of sows and gilts. The key reproductive event that determines when females begin their reproductive cycles is the onset of estrus. Estrus normally occurs spontaneously in gilts and mature females that are not pregnant or lactating. Once estrous cycles have begun, they normally occur every 18 to 21 days. From a produ...
متن کاملESTRUS SYNCHRONIZATION SYSTEMS: GnRH
Development of methods to manipulate the estrous cycle so that all cows are in estrus during a short, predefined period (synchronized estrus) while maintaining normal fertility has been a difficult goal to achieve, but has resulted in the creation of valuable synchronization protocols that are available to producers today. Although implementation of estrus synchronization and AI will improve th...
متن کاملReview of Estrus Synchronization Systems:cidr
The CIDR is an intravaginal progesterone insert, used in conjunction with other hormones to synchronize estrous in beef and dairy cows and heifers. The CIDR was developed in New Zealand and has been used for several years to advance the first pubertal estrus in heifers and the first postpartum estrus in cows. The CIDR is a “T” shaped device with flexible wings that collapse to form a rod that c...
متن کاملSynchronization of Estrus in Black Bengal Does
The present study was undertaken to measure estrus response (%), interval to estrus (hr), duration of estrus and conception rate (%) after synchronization in Black Bengal does. Synchronization of estrus was done by intramuscular injection of synthetic PGF2α as dinoprost. Two trials were conducted with twenty cyclic fertile adult Black Bengal does. The age and body weight of the does were betwee...
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ژورنال
عنوان ژورنال: Veterinary sciences
سال: 2022
ISSN: ['2397-3463']
DOI: https://doi.org/10.17582/journal.vsrr/2022/8.2.81.89