title: Department of health changes advice on third generation pills.
authors: S
authors: S
authors: Mayor
mesh_terms: D003277:Contraceptives, Oral, Combined / Q000009:adverse effects / Q000600:supply & distribution*; D017135:Desogestrel / Q000009:adverse effects / Q000600:supply & distribution*; D005260:Female; D006801:Humans; D009652:Norpregnenes / Q000009:adverse effects / Q000600:supply & distribution*; D010353:Patient Education as Topic; D012307:Risk Factors; D020246:Venous Thrombosis / Q000139:chemically induced
chemical_list: D003277:Contraceptives, Oral, Combined; D009652:Norpregnenes; C033273:Gestodene; D017135:Desogestrel