Specifications include, but are not limited to: Equine Theriogenology model built to the following specifications. *The primary base is the rear portion of a Quarter Horse model constructed of epoxy resin & fiberglass, a soft, flexible perineum panel, replica pelvic structure, and soft natural tail. *The equine uterus is attached to a dedicated perineum panel that fits into the horse model. It is suspended from the broad ligament, but is removable. *The multi-stage ovaries should include a set of anestrous ovaries, normal clear ovaries and a set of ovaries with follicles, and they should be interchangeable. A ligament should also be attached to the ovaries and trapped between the uterine broad ligament and the body wall. The uterus should incorporate a cervix and urethral orifice intended for palpation and illustrative purposes. *The model should include a Perineum Panel Assembly which consists of an equine uterus, perineum panel featuring anal and vulvar openings, and a rigid plastic flange to hold them in place. The equine reproductive tract panels should be easy to exchange inside the horse model.