title: The contraceptive efficacy of a Cu-IUD: size of the device and the uterine cavity.
abstract: This investigation deals with a small Cu-7 IUD (Cu-7-P), originally designed for women with uterine cavities less than 7 cm in sound measures.  The accidental pregnancy rate was almost doubled when this small IUD was used in women with normal-sized uterine cavities (sound measures 7-8 cm), when compared to that in women with small-sized uteri.  It was assumed that this difference in efficacy might be at least partly caused by the distribution of the increased fibrinolytic activity of the endometrium in the 2 groups of women.
authors.forename: B
authors.initials: B
authors.lastname: Larsson
authors.forename: B A
authors.initials: BA
authors.lastname: Lindhe
mesh_terms: D001769:Blood; D001777:Blood Coagulation; D003267:Contraception; D003268:Contraception Behavior; D003933:Diagnosis; D004194:Disease; D005193:Family Planning Services; D005342:Fibrinolysis; D007434:Intrauterine Devices; D007435:Intrauterine Devices, Copper
keywords: Blood Coagulation Effects; Contraception; Contraception Failure; Contraceptive Methods; Contraceptive Usage; Diseases; Examinations And Diagnoses; Family Planning; Fibrinolysis; Hematological Effects; Iud; Iud, Copper Releasing; Size