Chemical distinctions among body fluids.
D000653:Amniotic Fluid / Q000032:analysis; D001826:Body Fluids / Q000032:analysis*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009584:Nitrogen / Q000097:blood / Q000652:urine; D011183:Postoperative Complications / Q000175:diagnosis; D011247:Pregnancy
D009584:Nitrogen