ArticleActa obstetricia et gynecologica Scandinavica2026
Induced abortion, miscarriage, and the risk of breast cancer-A registry-based study from Finland.
Article in Acta obstetricia et gynecologica Scandinavica, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
1 citing paper in PubMed.
- Induced abortion, miscarriage, and the risk of breast cancer-A registry-based study from Finland.Acta obstetricia et gynecologica Scandinavica · 2026Article
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5 authors.
Funding
Abstract
introductionThe potential effect of induced abortion and miscarriage on the risk of breast cancer has remained debated and has been a persistent source of misinformation. Many previous studies have been small and based on self-reported data. We assessed the associations of induced abortion and miscarriage with the risk of pre- and postmenopausal breast cancer using high-quality Finnish registry data. MATERIAL AND
methodsThis is a case-control study based on population-based registry data. It includes 31 687 women with breast cancer diagnosed between 1972 and 2021, and their 158 433 female population controls matched by birth year and parity. Data on induced abortions, miscarriages, deliveries, use of postmenopausal hormone therapy, socioeconomic status (SES), and occupation were collected from the Finnish national registries. Multivariate conditional logistic regression analysis was performed.
resultsThe odds ratio (OR) of breast cancer among women with a history of induced abortion as compared with women with no history of induced abortion was 1.01 (95% confidence interval [CI] 0.92-1.10) in premenopausal (age <50 years) and 0.96 (95% CI 0.87-1.07) in postmenopausal (≥50 years) women. The corresponding ORs for miscarriage were 1.02 (95% CI 0.89-1.16) and 0.93 (95% CI 0.80-1.09). The OR did not vary significantly by the number of induced abortions or miscarriages, nor by the age at the time of first induced abortion or miscarriage.
conclusionA history of induced abortion and miscarriage, regardless of their number or age of the woman, is not associated with an increased risk of subsequent pre- or postmenopausal breast cancer.
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