Embryo Transfer
The Process and Costs; Donor Mares Available

Embryo transfer is a process where a "donor" mare is inseminated and at 7 days gestation, the embryo is flushed from the uterus of the "donor" mare and transplanted into a "recipient" mare. The recipient mare will then carry the pregnancy to term, give birth, and nurse the foal as if it were her own. The embryo foal will, however, have the genetics of the "donor" mare and the stallion she was bred to, with no genetics from the recipient mare.

This process allows breeders to obtain foals from expensive and talented mares without having to buy the "donor" mare. Purchasing an embryo also allows the owner to be present for the birth, do imprint training, and work with and train the foal from the time it hits the ground.

The IALHA does recognize this procedure and will register multiple foals in a single year.

For the process to be successful, we start with carefully selected mares to be used as "recipients". They need to be easy to handle, in good breeding health, and, preferably, previously had a foal without complications.

Once we have a "recipient" mare lined up, we get them to cycle with the "donor" mare by using hormone therapy. The "donor" mare is then bred to the stallion, the embryo flushed at 7 days, and implanted into the "recipient" mare. The "recipient" will be put on Regumate, checked in foal at day 14 (7 days after transfer), and at 28 days (to confirm a heart beat). The mare will be taken off Regumate at this point after confirming she is at a safe progesterone level. Once the recipeint mare is confirmed in foal at day 45, she is available for lease carrying the in-vitro purebred foal.

We offer embryos out of our incredible mares with a limited availability, with prices starting at $6,500 including all semen, egg, breeding, and transfer fees up to 45 days gestation. Please contact us for availability or if you would like details on how to build your own custom foal. Visit our Mares page and our Stallions page to envision the possibilities.


Recipient mares are available for lease for a deposit of $1,000 which is completely refunded on the return of the mare in good condition. There is a live foal guarantee on all of our embryos.
Please contact us if you have any other questions about the 'ET' process or are interested in purchasing an embryo transfer from one of our mares and stallions.
Rocky & Cara Rothrock ~ Streator, IL ~ (815)674-8885

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