8 Questions You May Have About Cryopreserving Bovine In Vivo–Derived Embryos

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Published on: December 27, 2017

John F. Hasler
Jfhasler05@msn.com
John.hasler@vetoqinol.com
Cell: 970-222-5302

Dr. Pat Comyn, the new chair of the AETA Education Committee, asked me to write a short piece clarifying some issues concerning the cryopreservation of bovine embryos for inclusion in the December issue of A Closer Look. The AETA has come a long way since our humble beginnings in 1983, and our 2017 membership now totals 556, including a large increase in the number of new members. The following facts and suggestions will be of most interest to our new and less experienced members. Not only are there many variables involved in successfully freezing and thawing bovine embryos, there also are many variations on most of the steps that do not notably detract from success rates. Having worked with many ET practitioners in 17 different states and a number of foreign countries, I have a pretty good idea of what works well and what does not. The following points are either based on published data that I deem to be replicable or based on my own experience and observations. Please feel free to contact me should you want advice or clarification.

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