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Related Experiment Video

Updated: May 4, 2026

In Vivo and Ex Vivo Approaches to Study Ovarian Cancer Metastatic Colonization of Milky Spot Structures in Peritoneal Adipose
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Abortion and breast cancer: case-control study.

Milena Ilic, Hristina Vlajinac, Jelena Marinkovic

    Tumori
    |December 12, 2013
    PubMed
    Summary

    A history of abortion, including induced and spontaneous types, was associated with a reduced risk of breast cancer. This protective effect was observed even for short pregnancies, suggesting a potential link between abortion and decreased breast cancer incidence.

    Area of Science:

    • Oncology
    • Reproductive Health
    • Epidemiology

    Background:

    • The relationship between abortion and breast cancer risk is a complex area of research.
    • Previous studies have yielded conflicting results, necessitating further investigation.

    Purpose of the Study:

    • To investigate the association between abortion history and the risk of developing breast cancer.
    • To determine if different types of abortion (induced vs. spontaneous) have varying effects on breast cancer risk.

    Main Methods:

    • A case-control study was conducted in Serbia between 2004-2005.
    • 191 women with newly diagnosed breast cancer (cases) were matched with 191 women without breast cancer (controls) based on age, hospital admission, and residence.
    • The analysis focused on parous women, including those with a history of induced or spontaneous abortions.

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    Main Results:

    • A history of any abortion was linked to a significantly reduced risk of breast cancer (adjusted OR, 0.46).
    • Both induced abortion (adjusted OR, 0.47) and spontaneous abortion (adjusted OR, 0.31) showed a protective effect against breast cancer.
    • The observed protective association did not appear to be influenced by the number of abortions, age at first abortion, or gestational age at first aborted pregnancy.

    Conclusions:

    • The study suggests that abortion, even following short pregnancies, may offer protection against breast cancer.
    • These findings contribute to understanding the potential long-term health implications of pregnancy outcomes.