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- W1437311971 abstract "Several studies have shown an increase in salpingitis among IUD users and it accepted that salpingitis predisposes for later extrauterine pregnancy. This led to the assumption of an indirect connection between IUD use and extrauterine pregnancy. Critical reevaluation of these studies concluded that skewed selection and other problems with the control groups led to an overestimate of the role of IUDs in salpingitis. This study used epidemiological data on extrauterine and intrauterine pregnancy in the Trondelag region of Norway to estimate the number of women experiencing extrauterine pregnancy nationwide and how many of these women used intrauterine devices at the times of conception. Continuation statistics from other studies and the sales figures for IUDs gave an estimate of total IUD usage. The IUD users were compared against 2 control groups: 1 excluding women who used hormonal contraceptives and 1 including them. Since hormonal contraceptives have a much lower Pearl index than IUDs the presence in the control group of women who use hormonal contraceptives will result in an unrepresentatively low number of pregnancies -- including extrauterine pregnancies -- in that group. With that correction no difference in incidence of extrauterine pregnancy for IUD users compared to nonIUD users could be demonstrated in any of the 3 years which were examined. There is however evidence from other studies that hormonal IUDs in contrast to the copper IUDs reported here may have an extrauterine effect." @default.
- W1437311971 created "2016-06-24" @default.
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- W1437311971 date "1988-04-20" @default.
- W1437311971 modified "2023-09-23" @default.
- W1437311971 title "[Intrauterine devices and ectopic pregnancies. An association that disappeared]." @default.
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