title: Production and excretion of urea by the fetal lamb.
mesh_terms: D000818:Animals; D001806:Blood Urea Nitrogen; D002247:Carbon Isotopes; D005260:Female; D005333:Fetus / Q000378:metabolism*; D008431:Maternal-Fetal Exchange; D008722:Methods; D011247:Pregnancy; D012756:Sheep; D014469:Umbilical Arteries
chemical_list: D002247:Carbon Isotopes