Hayden, S S Pregnancy rates in mares inseminated with 0.5 or 1 million sperm using hysteroscopic or transrectally guided deep-horn insemination techniques. [electronic resource] - Theriogenology Sep 2012 - 914-20 p. digital Publication Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 1879-3231 Standard No.: 10.1016/j.theriogenology.2012.04.006 doi Subjects--Topical Terms: AnimalsFallopian Tubes--surgeryFemaleHorses--physiologyHysteroscopy--methodsInsemination, Artificial--methodsMalePregnancyPregnancy RatePregnancy, AnimalProctoscopy--methodsRectumSemen Analysis--veterinarySperm Count--veterinary