title: Studies on gestation period in relation to effect of breed, parity, sex, and birth weight in cattle.
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D001724:Birth Weight; D002417:Cattle / Q000235:genetics / Q000502:physiology*; D005260:Female; D008297:Male; D010298:Parity; D011247:Pregnancy; D011270:Pregnancy, Animal; D012044:Regression Analysis; D012737:Sex Factors; D012744:Sex Ratio