title: The effect of tubal ligation on the incidence of epithelial cancer of the ovary.
abstract: A retrospective review of 666 women who underwent tubal ligation between 1930 and 1969 in Alberta, Canada, was undertaken to assess the effect of tubal ligation on the incidence of ovarian cancer. Tubal ligation did not affect the risk of ulterior ovarian cancer except in women who underwent tubal ligation between the ages of 20 and 29. These women showed a slight but statistically significant (p = 0.03) increase in observed versus expected cases of ovarian cancer.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008875:Middle Aged; D010051:Ovarian Neoplasms / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology*; D012189:Retrospective Studies; D012306:Risk; D013246:Sterilization, Tubal / Q000009:adverse effects*