The electrosurgical treatment of endometrial cysts in the mare

A minimally invasive technique for the removal of endometrial cysts is described. Intraluminal cysts hinder the migration of the embryo through the uterus in early pregnancy and in a later stage hinder placenta development and hence diminish the chance of successful pregnancy. Cysts can also give rise to false-positive results in early pregnancy tests. Endometrial cysts located in the lumen can be removed surgically from the standing mare. After placement of the endoscope, a wire is placed, via the biopsy channel, around the base of cyst, which is then cut through by cauterization. The cyst is removed with the help of forceps. Five barren mares with multiple cysts were treated in this way during the anoestrous period for October to February. Three of these mares became pregnant during the next oestrus period.