Twin births, sex of children and maternal risk of ovarian cancer: a cohort study in Norway |
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| Authors: | Albrektsen G Heuch I Thoresen S Kvåle G |
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| Affiliation: | Department of Mathematics, University of Bergen, Johannes Brunsgate 12, 5008 Bergen, Norway. msega@uib.no |
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| Abstract: | In a follow-up of 1,208,001 women aged 20-74 years, no significant association was found between twin births (112 cases) and risk, though those with twin girls had a non-significantly higher risk than those with singleton births; among the latter, those with girls only had a higher risk of endometrioid tumours (incidence rate ratio 1.35; 95% confidence interval 1.03-1.76, based on 475 cases) than women with boys only. |
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| Keywords: | ovarian cancer histology twin births sex of children |
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