@Arella Mae,
I'm still around. Got back from working heifers in Mackay and saw Ehbeth's post. As a general rule, signs of labor are pretty clear, especially after the water bag breaks. I have to admit that September is a pretty strange time for a mare to be foaling in the northern hemisphere, but strange things happen. We have an adage regarding equine reproduction that says "Always remember that 'mare' is a four-letter word". Seriously, though, mares generally foal easily without assistance. That's a good thing, because mares that do need assistance are in a fair amount of trouble. Unless there are obvious signs of a problem, the best thing you can do is usually to let her have the foal on her own. I would highly recommend three things after foaling: first, treat the foal's navel with iodine - seven percent tincture is the best. Secondly, make damned sure that the foal gets up and nurses. The mare's colostrum is by far the best preventive medicine the foal can get. Lastly, most foals are born constipated. It's not a bad idea to get a disposable fleet enema and use it prophylactically as soon as the foal gets up to nurse. That's the best advice I can give you for now! The Miz also reminded me that you should make sure she "cleans" - which means passes all the placenta - within two to four hours. The other thing I forgot is that if her two-year-old is a gelding, get him the hell out of there. Geldings have a bad habit of killing newborns. Good luck!