Oral contraceptives and folate deficiency.
D000328:Adult; D001766:Blindness / Q000209:etiology; D003276:Contraceptives, Oral / Q000009:adverse effects*; D005260:Female; D005494:Folic Acid Deficiency / Q000139:chemically induced* / Q000150:complications; D006801:Humans
D003276:Contraceptives, Oral