Resolution of True Breech.
Due to the length of the hindlimbs of the fetal foal it may be impossible to correct the abnormal posture in the case of a true breech. Once the foal is dead, one end of the fetotomy wire can be placed around one of the retained legs, and rethreaded in the vacant channel of the fetatome. The severed leg is then backed out of the birth canal. With the space created it may then be possible to retrieve the second leg. As a rule of thumb no more than two or three fetotomy cuts should be made in the mare to minimize trauma to the cervix and vagina of the mare which leads to the formation of adhesions.
Bierschwal CJ and deBois CHW (1975)