title: Endocrine effects on serum-vitamin-B 12 .
mesh_terms: D000328:Adult; D000740:Anemia / Q000209:etiology*; D003276:Contraceptives, Oral / Q000009:adverse effects*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications; D014805:Vitamin B 12 / Q000097:blood*
chemical_list: D003276:Contraceptives, Oral; D014805:Vitamin B 12