title: Response to letter to the editor.
authors: Kelli Stidham
authors: KS
authors: Hall
authors: James
authors: J
authors: Trussell
mesh_terms: D003268:Contraception Behavior; D003277:Contraceptives, Oral, Combined / Q000008:administration & dosage*; D003278:Contraceptives, Oral, Hormonal / Q000008:administration & dosage*; D045166:Estradiol Congeners / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D045167:Progesterone Congeners / Q000008:administration & dosage*
chemical_list: D003277:Contraceptives, Oral, Combined; D003278:Contraceptives, Oral, Hormonal; D045166:Estradiol Congeners; D045167:Progesterone Congeners