Originally Posted by Breezy2011
Also, what would be helpful tips to care for the pregnant mare in general after breeding and until weaning,...
Other than the medical care (shots, ultrasound/palpation, etc) and diet (no fescue, etc), the old saying is "treat her like a horse", I.e. You don't normally have to do anything terribly special.
... and what should you keep in mind before and after breeding, and questions to ask yourself?
As difficult as it is to think about, anyone considering breeding needs to be prepared for the risk of losing the foal and/or mare. If there is difficulty during the foaling that you cannot handle yourself (or are not there to see in the middle of the night), you're going to lose the foal before a vet could even get there. If there is a serious problem, e.g. Breech, you're more than likely going to lose the mare, too. Foaling happens without incident 99% of the time and the risk is low, but problems do happen.