Hi Hallie...Let's see, back in the day when I was also showing Salukis, one of my dear friends, Dr. Gertrude Hinsch, who is a geneticist for some university in Fla. wrote a paper on puppy sex determination which I believe was based on placement in the uterine horns. Have patience and I will go up into the attic and see if I can find it for you. I can then scan it and email it to you. It has been a long time and, frankly I can't really remember exactly what her article said. Cynthia Seth McMullen <mcmuse@xxxxxxx> wrote: We just had a litter of 8 GSD puppies, 7 of the puppies are male. The last litter by this same male had 3 puppies in it, all of which were female. I was just curious if anyone had any thoughts on how puppy gender is determined? Someone suggested that it might be due to the timing of the breeding during the heat cycle, etc. I thought I would ask the pros. Thanks in advance, Hallie ============================================================================ 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 ============================================================================ __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ============================================================================ 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 ============================================================================