Updated: 11/10/2015 Estrous Synchronization (Ovulation Induction) and Ovsynch John Parrish.

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Presentation transcript:

Updated: 11/10/2015 Estrous Synchronization (Ovulation Induction) and Ovsynch John Parrish

Updated: 11/10/2015 To understand how estrus and ovulation manipulation work. Details are provided for you to review on your own time! Learning Objective

Updated: 11/10/2015 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 season

Updated: 11/10/2015 Cattle 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 Ovsynch

Updated: 11/10/2015 Sheep 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 orally

Updated: 11/10/2015 Swine Prostaglandin » Not of practical use (only effect days ) Progestins - Altrenogest (Regumate) » MGA causes ovarian cysts » Regumate (oral) for 18 days Cost is $5 - $10/day Wean Piglets Puberty Induction - PG600

Updated: 11/10/2015 Equine 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 days.