title: The incidence of pernicious anaemia and the etiology of folic acid deficiency in pregnancy.
mesh_terms: D000752:Anemia, Pernicious; D005365:FIGLU Test; D005260:Female; D005492:Folic Acid / Q000097:blood; D005494:Folic Acid Deficiency / Q000209:etiology*; D005500:Follow-Up Studies; D006801:Humans; D011247:Pregnancy; D011250:Pregnancy Complications, Hematologic / Q000209:etiology*; D014805:Vitamin B 12 / Q000097:blood
chemical_list: D005492:Folic Acid; D014805:Vitamin B 12