Question: signs a mare will foal?
Answer: Before foaling. One of the first signs is the distended udder. ... 
Filling of the teats. as the udder enlarges. ... 
Relaxation of the muscles of the pelvic area. Relaxation of this region usually occurs about 3 weeks before foaling. ... 
Waxing. ... 
Relaxation of the vulva. ... 
Milk flow. ... 
Restlessness. ... 
Sweating.