I have experienced both chilled and frozen and we had puppies each time. Of course with frozen you must do an implant, but with chilled we did an AI and had 5 beautifuls puppies. So many factors are important for a good breeding..and luck is helpful too. Sometimes nature go it's own way and we can't explain why it didn't work cause all the pieces seems to be in good place. I would do trans-cervical again if my vet would recommend it but I would'nt have any problem either proceeding with the implant. Julie Harel Montreal, Qc ============================================================================ POST is Copyrighted 2006. 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. 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@xxxxxxxxxxxx VISIT OUR WEBSITE - URL temporarily deleted due to AOL issues ============================================================================