Epidemiology of endometriosis in infertile women
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This case-control study found that shorter menstrual cycles (≤27 days) were associated with endometriosis in infertile women, while smoking showed a trend toward a protective effect.
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Abstract
OBJECTIVE: To assess the epidemiological factors linked to endometriosis in infertile women.
SETTING: Academic tertiary hospital.
DESIGN: Case-control study.
PATIENTS: One hundred seventy-four infertile women with endometriosis and 174 infertile women without endometriosis, all of them studied by laparoscopy.
RESULTS: Women with endometriosis and infertility had a higher frequency of cycles < or = 27 days (26.4% versus 16.7%). A trend to a protective effect of smoking was detected. Social class, reproductive history, infertility history, previous abortions, age, family history, age at menarche, and duration of menstrual flow were similar in both groups.
CONCLUSION: Cycles < or = 27 days was the only risk factor that seemed to be associated to endometriosis in infertile patients. However, predictive values were low. A trend to a protective effect of smoking was detected.
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- europepmc
- last seen: 2026-06-13T06:22:48.782012+00:00
- pubmed
- last seen: 2026-05-13T22:11:18.900538+00:00
- unpaywall
- last seen: 2026-05-14T19:30:52.867331+00:00
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Courtesy of the U.S. National Library of Medicine
Courtesy of the U.S. National Library of Medicine