Single Mummified Fetus in a Mare

Mummification of an equine fetus, though rare, is more commonly associated with a twin pregnancy rather than singleton pregnancy. A single mummified fetus was removed from the uterus of a 17-year-old multiparous Arabian mare at 341 days of gestation. Throughout the 11 month gestation, the mare was administered 22 mg altrenogest (Regu-Mate, Intervet Inc., Millsboro, DE) PO SID. When the mare’s mammary gland failed to develop at 339 days of gestation, altrenogest was discontinued and the mare came into estrus. [...]