Fertility of heifers after synchronization of estrus using GnRH, PGF2α, and progesterone (CIDR)
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چکیده
منابع مشابه
EFFECT OF ESTRUS SYNCHRONIZATION PROTOCOLS INCLUDING PGF2α AND GnRH ON FERTILITY PARAMETERS IN HAIR GOATS DURING BREEDING SEASON
The present study was performed to determine the effect of PGF2α and GnRH injections in different time intervals on fertility in Hair goats during breeding season. Totally, 80 primiparous Hair goats were divided into four groups (n=20 in each) according to the body condition scores of the animals. The animals in groups were treated as follows; first group (Ovsynch), GnRH on day 0, PGF2α on day ...
متن کاملNevada REVIEW OF ESTRUS SYNCHRONIZATION SYSTEMS : CIDR
The CIDR is an intravaginal progesterone insert, used in conjunction with other hormones to synchronize estrus 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 ca...
متن کاملEstrus Performance of Boran and Boran × Holstein Friesian Crossbred Cattle Synchronized with a Protocol based on Estradiol Benzoate or Gonadotrophin-Releasing Hormone
The objectives of this study were to determine estrus behavior, interval to estrus, duration of estrus and time of ovulation of Boran, and Boran × Holstein Friesian (HF) breeds. A total of 113 cows and heifers from the two breeds were synchronized with two estrus synchronization protocols: 1) estradiol benzoate (EB) + controlled internal drug release (CIDR) + prostaglandin (PGF2α); and 2) gonad...
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 کاملComparison of controlled internal drug release insert-based protocols to synchronize estrus in prepubertal and estrous-cycling beef heifers.
The objective of the experiment was to examine the necessity of adding a GnRH injection to a 14-d controlled internal drug release (CIDR)-based protocol for synchronization of estrus in beef heifers that were prepubertal or estrous-cycling at the initiation of treatment. The hypothesis tested was that the addition of GnRH in a CIDR-based estrus synchronization protocol would increase the synchr...
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ژورنال
عنوان ژورنال: Kansas Agricultural Experiment Station Research Reports
سال: 2002
ISSN: 2378-5977
DOI: 10.4148/2378-5977.1735