Study: Women Who Have Abortion 626% More Likely to Have Breast Cancer

International   Steven Ertelt   Jan 3, 2014   |   6:47PM    New Delhi, India

A new study of women from India shows women who get an induced abortion are 626% more likely to have breast cancer compared with women who carry their pregnancies to term and have the baby. The study found women more likely to have breast cancer had “higher number of abortions.”

This study follows closely after a bomshell meta-analysis of breast cancer studies found a 44% increased risk of contracting breast cancer for women who had abortions.

“History of abortion was also found to be positively associated with the risk of breast cancer with 6.26 times higher risk in women having a history of abortion,” they concluded.

The doctors conducting the new study are based at the Department of Gastroenterology and Human Nutrition Unit, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India. Their report, published in the Indian Journal of Cancer confirms what previous studies have shown, namely that an abortion weakens the breast’s muscle tissue in a way that makes it more susceptible to cancer.

“It has been suggested that abortions leave the breast epithelium in a proliferative state with an increased susceptibility to carcinogenesis,” they write.

“Clinical, animal, and epidemiological studies have clearly demonstrated that cancer is a hormonally mediated disease and several factors that influence hormonal status or are markers of change in hormonal status have been shown to be associated with the risk of breast cancer,” they write. “Three hundred and twenty newly diagnosed breast cancer cases and three hundred and twenty normal healthy individuals constituted the study population. The subjects in the control group were matched individually with the cases for their age ± 2 years and socioeconomic status. A pre-tested, semi-structured questionnaire was administered to each individual to collect information on identification data, socio-demographic profile, and reproductive factors.”

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“However, the cases had a significantly higher number of abortions (61.3%) as compared to the controls (16.3%),” they wrote. “History of abortion was also found to be positively associated with the risk of breast cancer with 6.26 times higher risk in women having a history of abortion. The history of abortions was found to be significantly higher in breast cancer cases as compared to controls, with the Relative Risk (RR) = 6.26 in women having a history of abortion.”

Citation: Bhadoria A S, Kapil U, Sareen N, Singh P. Reproductive factors and breast cancer: A case-control study in tertiary care hospital of North India. Indian J Cancer 2013;50:316-21