Effects of stress factors on the estrous cycles of beef heifers.
D000818:Animals; D002417:Cattle / Q000502:physiology*; D002418:Cattle Diseases / Q000503:physiopathology*; D004971:Estrus; D005260:Female; D007315:Insemination, Artificial / Q000662:veterinary; D011247:Pregnancy; D013312:Stress, Physiological / Q000503:physiopathology / Q000662:veterinary*