Unilateral segmental aplasia of the uterine horn in a Labrador Retriever

Abstract

A 4 year old intact female Labrador Retriever was presented pregnant with one fetus. She was scheduled for an elective cesarean section because she was pregnant with a single fetus. Her pre-operative bloodwork showed leukocytosis with a left shift. At surgery, she had one normal uterine horn with a normal, full-term, viable fetus that was successfully delivered. The opposite horn was incomplete, ending in a blind pouch approximately 10 cm proximal to the cervix containing purulent material suggestive of pyometra. This blind pouch/segmental aplastic horn, was removed, leaving the normal horn intact and in situ. She went on to be bred another time and produced a litter of four pups. One bitch puppy from this litter was retained by the owner for his breeding program. On her first litter, she was found to have two normal uterine horns and produced a litter of ten pups.