{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T00:56:41Z","timestamp":1790470601221,"version":"4.1.0"},"reference-count":20,"publisher":"BMJ","issue":"6257","license":[{"start":{"date-parts":[[1981,1,3]],"date-time":"1981-01-03T00:00:00Z","timestamp":347328000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/www.bmj.com\/company\/legal-information\/terms-conditions\/legal-information\/tdm-licencepolicy"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Br Med J (Clin Res Ed)"],"published-print":{"date-parts":[[1981,1,3]]},"abstract":"<jats:p>In a 20-year longitudinal study on ectopic pregnancy in a defined population of women aged 15-39 years the rate of ectopic pregnancy per 1000 diagnosed conceptions increased from 5.8 during 1960-4 to 11.1 during 1975-9. The mean annual incidence of ectopic pregnancy per 1000 women increased from 0.6 to 1.2 during the same period. The numbers of ectopic pregnancies per 1000 diagnosed conceptions increased with increasing age of the women and were 4.1, in the teenage group 6.9, in women aged 20-29 years, and 12.9 in women aged 30-39. Among 20- to 29-year-old sexually active women at risk of pregnancy who had never had acute salpingitis the rates of ectopic pregnancy per 100 woman-years were the same in those who did not use contraceptives as in those using non-medicated or copper-medicated intrauterine contraceptive devices (IUCDs; 0.3\/100 woman years). The risk of an ectopic pregnancy increased sevenfold after acute salpingitis. These findings confirm the increased risk of ectopic pregnancy after salpingitis and suggest that the increase in the incidence of ectopic pregnancy in Lund from 1960 to 1979 was partly accounted for by the use of IUCDs.<\/jats:p>","DOI":"10.1136\/bmj.282.6257.15","type":"journal-article","created":{"date-parts":[[2009,4,2]],"date-time":"2009-04-02T11:00:59Z","timestamp":1238670059000},"page":"15-18","source":"Crossref","is-referenced-by-count":210,"title":["Incidence, trends, and risks of ectopic pregnancy in a population of women."],"prefix":"10.1136","volume":"282","author":[{"given":"L","family":"Westr\u00f6m","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"L P","family":"Bengtsson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P A","family":"M\u00e5rdh","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[1981,1,3]]},"reference":[{"key":"ref_1","first-page":"1784","article-title":"Kunstliche Schwangerschaftsunterbrechung und extrauterine Schwangerschaft","volume":"93","author":"Cernoch, V.A.","year":"1971","unstructured":"Cernoch VA. 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Radiologic and pathologic studies","volume":"36","author":"Persault, V.","year":"1970","unstructured":"Persault V. Etiology of tubal pregnancy. Radiologic and pathologic studies. Obstet Gynecol 1970;36:257-65.","journal-title":"Obstet Gynecol"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"455","DOI":"10.1016\/0010-7824(79)90061-1","article-title":"Effect of the venereal disease epidemic on the incidence of ectopic pregnancy-implications for the evaluation of contraceptives","volume":"19","author":"Urquhart, J.","year":"1979","unstructured":"Urquhart J. Effect of the venereal disease epidemic on the incidence of ectopic pregnancy-implications for the evaluation of contraceptives. Contraception 1979;19:455-80.","journal-title":"Contraception"},{"issue":"100","key":"ref_13","first-page":"4131","article-title":"Intrauterine preventivmedel-biverkningar och kvinnornas vardering","volume":"1","author":"Westrom, L.","year":"1972","unstructured":"Westrom L. Intrauterine preventivmedel-biverkningar och kvinnornas vardering i 1 100 fall. Lakartidningen (Stockholm) 1972;69:4131-35.","journal-title":"Lakartidningen (Stockholm)"},{"key":"ref_14","article-title":"Epidemiology, diagnosis, clinical manifestations, and sequelae","author":"Westrom, L.; inflammatory disease. I, Mardh P.-A.Pelvic","unstructured":"Westrom L, Mardh P-A. Pelvic inflammatory disease. I. Epidemiology, diagnosis, clinical manifestations, and sequelae. Geneva: WHO (in press). (Technical Report Series.)"},{"key":"ref_15","article-title":"Incidence, prevalence, and trends of pelvic inflammatory disease and its consequences in industrialised countries. Amer Jf Obstet Gynecol","author":"Westrom, L.","unstructured":"Westrom L. Incidence, prevalence, and trends of pelvic inflammatory disease and its consequences in industrialised countries. Amer Jf Obstet Gynecol (in press)."},{"key":"ref_16","article-title":"Impact of sexually transmitted diseases on human reproduction. 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