title: Megaloblastic anaemia due to pyridoxine deficiency associated with prolonged ingestion of an oestrogen-containing oral contraceptive.
mesh_terms: D000748:Anemia, Macrocytic / Q000139:chemically induced*; D000749:Anemia, Megaloblastic / Q000139:chemically induced*; D004997:Ethinyl Estradiol / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008875:Middle Aged; D009640:Norethindrone / Q000009:adverse effects*; D026681:Vitamin B 6 Deficiency / Q000139:chemically induced*
chemical_list: D004997:Ethinyl Estradiol; D009640:Norethindrone