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Embryo Transfer:

Synchronizing Recipients

All of the recipients must be synchronized to have heats within a 48 hour window of the time that the embryos will be transferred (24 hours before and 24 hours after). Heats are recorded and one week later the embryos are transferred. This insures that the embryo will be able to signal to the recipient that it is pregnant. The process of synchronizing heats for embryo transfer is very similar to the protocols used for synchronizing a herd for an AI program. The only difference is that the recipient is not artificially inseminated. The ovum that she ovulates is allowed to die so an embryo can be transplanted in its place.

After implantation, ultrasonography is utilized to determine if the recipient is carrying an embryo calf.

What Makes a Good recipient

Simply put good recipients are good mothers. Typically quality recipients range in age from 3 to 10 years.

Not All Synchronized recipients Will Receive An Embryo

Recipients must be palpated by Dr. Wehrman to determine if a corpus luteum (CL) is present and of appropriate size. At this point he can also determine if there are any significant flaws with the recipient's tract that would enable her from being a good recipient. If the recipient passes, an embryo is then placed into the uterine horn.

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