New Birth Control Pills Raise Breast Cancer Risk

by Raksha Hegde published on -

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Contemporary birth control pills may increase a woman’s chance of developing breast cancer by as much as 38 percent if used for 10 years or more. This comes as a disappointment to women and doctors who had hoped that the lower doses of hormones in both oral and non-pill contraceptives might be safer than the older versions of birth control pills.

The study, published in the New England Journal of Medicine, evaluated about 1.8 million women in Denmark between 15 to 49 years of age. The researchers compared women who purchased birth control methods with women who developed breast cancer for a period of almost 11 years.

Researchers found that the effect of the pill depended on the amount of time the women used the hormonal contraceptive. Those who had used hormonal birth control for less than a year had only a 9 percent increase in their relative risk. Women who used any hormone-based contraceptive for five years or more raised the risk of breast cancer by 20 percent. On the other hand, women who had used birth control pills for more than 10 years showed a 38 percent increase in risk.

The study concluded that the overall increased risk was small. It amounted to one extra case of breast cancer among 7,690 women using hormone contraceptives per year. The study was funded by the Novo Nordisk Foundation. The study also stated that two of its research authors were employed by the foundation after the manuscript was accepted for publication.

According to the National Institute for Health, about 252,719 women in the US were diagnosed with breast cancer in 2017. The institute also estimates that 12.4 percent of American women will be diagnosed with breast cancer at some point during their lifetime.

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About the Author

Raksha Hegde is the content director at Organic Facts and helps oversee a team of brilliant, dynamic content writers. She completed her MS in Broadcast Journalism from Boston University, US. A former business news journalist and editor, Raksha followed her passion for wellness to become a certified Yoga teacher and a wellness festival curator. She believes that learning is a life-long process; she did a certificate e-course on “Introduction to Food and Health” in 2019 from Stanford University, US. 

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