title: Response to Dr. Szarewski.
authors.affiliation: Margaret Pyke Professor of Sexual & Reproductive Health, UCL; Programme Director for Women's Health, UCL Partners, London UK. Electronic address: judith.stephenson@ucl.ac.uk.
authors.forename: Judith
authors.initials: J
authors.lastname: Stephenson
mesh_terms: D003268:Contraception Behavior; D003277:Contraceptives, Oral, Combined / Q000008:administration & dosage*; D004997:Ethinyl Estradiol / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D016912:Levonorgestrel / Q000008:administration & dosage*; D057285:Precision Medicine
chemical_list: D003277:Contraceptives, Oral, Combined; D004997:Ethinyl Estradiol; D016912:Levonorgestrel