Gall-stones and oral contraceptives.
D000328:Adult; D000367:Age Factors; D002769:Cholelithiasis / Q000139:chemically induced*; D003276:Contraceptives, Oral / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008875:Middle Aged; D010298:Parity
D003276:Contraceptives, Oral