title: Ravenholt: availability key to contraceptive use.
mesh_terms: D003275:Contraceptive Devices, Male / Q000600:supply & distribution; D003276:Contraceptives, Oral / Q000600:supply & distribution; D005193:Family Planning Services; D005260:Female; D006801:Humans; D008297:Male
chemical_list: D003276:Contraceptives, Oral