I am a big fan of transcervical AIs, and technically it gets to exactly the same place so when using frozen, there "should" be the same success ratio. The problem I see isn't with the method but that there is such a small (12 hour or so depending on quality) window of viability once frozen is thawed that your timing has to be dead on. We have a BIG margin for error when using natural or chilled/extended. I have heard so much nonsense re timing from vets that propose to be repro experts lately that I am left scratching my head. AND if you are using frozen you can't be working with a vet (OR A LAB!) who takes weekends off! Kathy, member GSDCA, DVGSDC Celebrating generations of Dual Titled TC'd Champions visit _http://www.pinehillgsds.com/_ (http://www.pinehillgsds.com/) ============================================================================ POST is Copyrighted 2011. All material remains the property of the original author and of GSD Communication, Inc. NO REPRODUCTIONS or FORWARDS of any kind are permitted without prior permission of the original author AND of the Showgsd-l Management. ALL RIGHTS RESERVED. Each Author is responsible for the content of his/her post. This group and its administrators are not responsible for the comments or opinions expressed in any post. ALL PERSONS ARE ON NOTICE THAT THE FORWARDING, REPRODUCTION OR USE IN ANY MANNER OF ANY MATERIAL WHICH APPEARS ON SHOWGSD-L WITHOUT THE EXPRESS PERMISSION OF ALL PARTIES TO THE POST AND THE LIST MANAGEMENT IS EXPRESSLY FORBIDDEN, AND IS A VIOLATION OF LAW. VIOLATORS OF THIS PROHIBITION WILL BE PROSECUTED. For assistance, please contact the List Management at admin@xxxxxxxxxxx VISIT OUR WEBSITE - http://showgsd.org SUBSCRIPTION:http://showgsd.org/mail.html NATIONAL BLOG - http://gsdnational.blogspot.com/ ============================================================================