Dillon Cow Horses and Reproduction Center LLC
2174 Tammany Creek Road
Lewiston, Idaho 83501
Phone: 208-743-8366 - Fax: 208-743-0763
e-mail: dillonhorses@msn.com 

Authorization and Consent Form: Transvaginal Ultrasound-Guided Follicle Aspiration 

            Transvaginal ultrasound-guided follicle aspiration (TVA) is a relatively new procedure that is used to collect an oocyte (egg) directly from an ovarian follicle. The oocyte is then transferred to the oviduct of a synchronized, inseminated recipient mare where it can establish pregnancy. The TVA procedure involves placing a transvaginal ultrasound probe into the vagina of the mare to allow imaging of the ovarian follicle. Following placement of the probe, and using the ultrasound image as a guide, a needle is advanced into the follicle, which allows the follicular fluid and oocyte to be collected. 

            The success rate of collecting an oocyte using the TVA procedure is approximately 60% to 65%. Because this procedure is relatively new, data on risks associated with it is still being compiled. Although the procedure is minimally invasive, there are risks. The procedure involves transrectal manipulation of the reproductive tract, so there is the risk of a rectal tear.  In addition, although the needle is advanced with ultrasound guidance, there is the potential for the needle to puncture a blood vessel in or around the reproductive tract. If the needle causes internal bleeding, it can be a life-threatening situation. There has been one report of a mare suffering severe internal bleeding following the TVA procedure. Based on that published report, the risk of severe bleeding is low (less than 0.3%). Although the risks associated with the TVA procedure are low, they cannot be completely eliminated.
            I acknowledge that I have read the above, and understand the cited risks. I also understand that no guarantee or assurance can be made of the results that may be obtained with this procedure.  
            During the time that the mare is in the custody of Frank Dillon Cow Horses, Frank Dillon Cow Horses shall not be held liable for any sickness, disease, injury or death which may be suffered by the mare and/or foal at side.  
Insured by: _________________________________  Contact # ________________________________ 

            The mare owner allows Frank Dillon to have any veterinary services deemed necessary for proper treatment and protection of mare and or foal at side.   
            This contract is made in Nez Perce County, State Of Idaho and the laws of the State of Idaho shall apply to all aspects of this agreement. 

Mare Name: ____________________________________Registration # _________________
                        Age _______________      Breed _____________________________________
Owner’s name: ________________________________________________