Colic can also cause these signs, and it is possible for a mare to become colicky from constipation prior to foaling. If the colic signs become severe or the signs continue for hours, call a veterinarian. The second stage of labor can last from a few to 30 minutes and include contractions and delivery. It is important to leave the mare alone at this point if birth is progressing normally. Disturbances may interrupt or prolong the birth process.
Birth usually occurs shortly after the outer water bag ruptures.
Presentation of the foal's front feet occurs first in a normal delivery, soles down, relatively close together, one slightly more advanced than the other to help reduce the circumference of the foal's shoulders and easing passage through the pelvis, the nose of the foal should be tucked between the extended forelegs near the knees. Standing mares should be held to prevent excessive walking. If the mare delivers standing, someone should catch the foal and gently lower it to the ground to prevent injuring the newborn foal and to prevent the tearing of the umbilical opening in the abdominal wall and predispose the foal to a hernia. If the mare lies down next to a wall or fence, make sure there is plenty of room for the foal's delivery, or cause the mare to rise and allow her to select another location not so close to an obstacle. The mare will usually rest after the passage of the shoulders and again after the passage of the hips.