Uterine Inertia due to Severe Selenium Deficiency in a Parturient Mare.

The research article discusses a case of uterine inertia in a pregnant mare due to critical selenium deficiency, ruling out other common causes of difficulty in giving birth.

Understanding the Research

• The research focuses on a specific case of a 12-year-old mare, who is a show jumper and has been used as an embryo recipient, meaning she was impregnated with an embryo from another horse. This mare was taken to a veterinary hospital seven days past her expected due date because she was showing mild signs of discomfort and had a dilated cervix. Colic refers to various signs of abdominal pain in a horse, which often manifest as restlessness, rolling, and other changes in behavior.
• Dystocia, or difficulty birthing, is a serious and potentially fatal issue in horses. In this case, the vets ruled out gastrointestinal or metabolic issues and malpositions of the foal (the usual causes of dystocia) and diagnosed the mare with uterine inertia. Uterine inertia is a condition in which the uterus fails to contract enough to expel the fetus, hence prolonging labour.
• The mare was treated with oxytocin, a hormone that is usually effective in stimulating uterine contractions and assisting the birthing process. However, in this case, the treatment was ineffective.

Intervention and Findings

• The professionals at the veterinary hospital were eventually forced to deliver the foal through a C-section, a procedure that is typically high-risk for horses. The foal (a female, known as a filly) was alive but was diagnosed with severe white muscle disease. This is a condition caused by selenium deficiency that causes weakness and issues with the heart and muscles. The filly required intensive treatment to survive.
• Following the delivery, tests were conducted to evaluate the mare’s overall health. These tests revealed a severe deficiency of selenium, an essential trace element that plays a crucial role in various metabolic functions.
• The deficiency was not exclusive to the mare and her foal; further tests also discovered selenium deficiency in the herd from which they originated.

Conclusions of the Research

• The research concludes that selenium deficiency can be a determining factor in cases of uterine inertia when other common causes of dystocia are not present. This finding is significant because it indicates that deficiencies in key nutrients and minerals can have significant impacts on animal health, influencing serious conditions like dystocia.