mares!!!!!!!!!

[formymommy]

wut are some signs that i can look for if my mare is pregnant?
we bought a horse that is really thin and the guy we got her from had a stud in the pin with her for about a month and now we can still see her ribbs and her hips but her stomach hangs really low but we can see her ribbs and we was watching houston spca on tv and they had a really thin horse that was pregnant and we were like hey that horses stomach looks like our mares stomach and we were just looking at her and she rezimbles that horse a lot but we dont really know wut to look for besides her tummy hanging low and her being thin in the ribbs but fat stomach hanging low................we would love an answer please.
thanks,
tejas riders rule