I'm so sorry for your loss. no-sad Sounds like it may have been hip lock. Last year I had a full term colt born...was limp and got him stimulated and started moving around and a couple of gasps but never could get him breathing. Did CPR for half an hour until we lost the heart beat too. It was heartbreaking for me and the mare. The vet thought she had an early placental detachment and it was a large colt and took a few minutes to get him out so he just didn't get enough oxygen. This year she had a lovely silver dapple pinto filly and is such a good mom! Take care of your mare...she needs you now. You'll be doing the "what if" and "if only" for a while. It's natural but non-productive. It happened, it was sad, and you've got to pick yourself up and keep going. {{{{{HUGS}}}}}