Fetoplacental Steroids and eCG Concentrations in a Pregnant Mare Receiving Intrauterine Cloprostenol Sodium

Recently, a new therapeutic procedure involving intrauterine (IU) administration of cloprostenol (CLP) was described to terminate unwanted pregnancies in surrogate mares. Despite widespread use of this technique in South America, there are limited data on fetoplacental steroids and eCG concentrations following IU administration of CLP. The objectives were to determine clinical reproductive parameters, progesterone, estrogens and equine chorionic gonadotropin (eCG) concentrations following IU administration of CLP in a controlled abortion case. A seven year-old maiden Quarter Horse mare was presented for pregnancy termination at 60 days after ovulation.