Estrous Synchronization (Ovulation Induction) and OvsynchPowerPoint PresentationSlide 3CattleSheepSwineEquineUpdated: 01/14/19 Estrous Synchronization (Ovulation Induction)and OvsynchEstrous Synchronization (Ovulation Induction)and OvsynchJohn ParrishUpdated: 01/14/19 To understand how estrus and ovulation manipulation work.Details are provided for you to review on your own time!Learning ObjectiveUpdated: 01/14/19 Estrus synchronization: Why? 1. Group females for parturition: a. Labor, Calving period b. More uniform weaning weights. 2. Reduce or eliminate estrus detection. 3. Needed for artificial insemination: Reduce calving seasonReduce calving seasonUpdated: 01/14/19 CattleCattle•Prostaglandins - Regression of CL»Lutalyse, estrumate•Progestins - Prevents estrus and ovulation»CIDR, MGA»Combined with prostaglandins•GnRH - Ovulation, terminate follicular wave»Combined with prostaglandins in OvsynchUpdated: 01/14/19 SheepSheep•Progestin»CIDR, vaginal pessary (sponge)»In season - works alone»Out of season - requires eCG•Prostaglandin»Lutalyse, estrumate»Only works in season•Lights - decrease day length•Melatonin - give orallyUpdated: 01/14/19 SwineSwine•Prostaglandin »Not of practical use (only effect days 12 - 17)•Progestins - Altrenogest (Regumate)»MGA causes ovarian cysts»Regumate (oral) for 18 days•Cost is $5 - $10/day•Wean Piglets•Puberty Induction - PG600Updated: 01/14/19 EquineEquine•Prostaglandin»Lutalyse - similar usage as cow»Mare CL more sensitive than cow’s»Only effective in season•Progestins»Regumate»Reduce estrus behavior in competition animals»Only effective in season•Light»16 hrs day light for 60 - 90
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