Some reproductive statistics from the Polish National Stud.
D000034:Abortion, Veterinary / Q000453:epidemiology; D000818:Animals; D001947:Breeding; D005260:Female; D006734:Horse Diseases / Q000453:epidemiology; D006736:Horses / Q000502:physiology*; D008297:Male; D011044:Poland; D011247:Pregnancy; D012098:Reproduction