OESTRUS SYNCHRONIZATION, ARTIFICIAL INSEMINATION AND EARLY REBREEDING IN YANKASA SHEEP

The Synchronization of Oestrus in Sheep in Artificial Insemination Programmes

Comparison of Different Methods of Oestrus Synchronization on Reproductive Performance of Farahani Sheep in Iran

This experiment was carried out on 123 Farahani ewes from a herd in Delijan city in Markazi province of Iran to determine the best short-term method for oestrus synchronization. Ewes were divided into five experimental groups randomly: group 1) use of controlled intervaginal drug release devices (CIDR) for 7 days with intramuscular (IM) injection of PGF2α on zero day and IM injection of 500 IU ...

Estrous Synchronization and Artificial Insemination in Sows: A Field Study

Synchronization of ovulation and artificial insemination of sows after lactation.

The administration of PMS:HCG proved satisfactory as a method for synchronizing estrus and ovulation in sows after 3 or 6 weeks of lactation and permitted artificial insemination at one time without relying on the detection of estrus. Fifty-eight Duroc sows were assigned randomly as controls or to a hormonal-treatment group when their litters were weaned at 3 or 6 weeks of age. Twenty-nine sows...

Keys to Successful Estrus Synchronization and Artificial Insemination Programs

Introduction The development of effective methods of synchronizing estrus and ovulation has been based on our understanding of the physiological and hormonal mechanisms controlling the estrous cycle and the initiation of estrous cyclicity and prepuberty in heifers and postpartum cows. Although estrus synchronization products (PGF2, MGA, CIDR and GnRH) and protocols have changed over time, the ...