title: Metabolizable energy requirements of pregnant dairy cows.
mesh_terms: D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002245:Carbon Dioxide / Q000032:analysis; D002417:Cattle / Q000378:metabolism*; D005314:Embryonic and Fetal Development; D005260:Female; D008697:Methane / Q000032:analysis; D008722:Methods; D010101:Oxygen Consumption; D011247:Pregnancy; D011270:Pregnancy, Animal; D013997:Time Factors
chemical_list: D002245:Carbon Dioxide; D008697:Methane