title: [Changed routines in connection with first prescription of oral contraceptives. Lower risk of venous thromboembolism with levonorgestrel preparations].
authors.affiliation: Kvinnokliniken, Sahlgrenska Universitetssjukhuset, Göteborg. ian.milsom@obgyn.gu.se
authors.forename: Ian
authors.initials: I
authors.lastname: Milsom
authors.forename: Viveca
authors.initials: V
authors.lastname: Odlind
authors.forename: Bo
authors.initials: B
authors.lastname: von Schoultz
authors.forename: Ingrid
authors.initials: I
authors.lastname: Ostlund
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Persson
mesh_terms: D003277:Contraceptives, Oral, Combined / Q000008:administration & dosage / Q000009:adverse effects*; D003280:Contraceptives, Oral, Synthetic / Q000008:administration & dosage / Q000009:adverse effects*; D000075202:Contraindications; D017135:Desogestrel / Q000008:administration & dosage / Q000009:adverse effects; D004346:Drug Information Services; D011307:Drug Prescriptions; D005260:Female; D006801:Humans; D016912:Levonorgestrel / Q000008:administration & dosage / Q000009:adverse effects; D017410:Practice Guidelines as Topic; D011372:Progestins / Q000008:administration & dosage / Q000009:adverse effects; D012307:Risk Factors; D013923:Thromboembolism / Q000139:chemically induced*; D020246:Venous Thrombosis / Q000139:chemically induced*
chemical_list: D003277:Contraceptives, Oral, Combined; D003280:Contraceptives, Oral, Synthetic; D011372:Progestins; D016912:Levonorgestrel; D017135:Desogestrel