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Breast Cancer Health Center

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The Birth Control Pill and Breast Cancer Risk

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Since the early 1960s, birth control pills have become the most popular and one of the most effective forms of birth control used in the U.S. But an association between estrogen and an increased risk of breast cancer has led to a continuing debate about the role birth control pills may play in developing breast cancer.

For most women, especially young women, experts say the benefits of birth control pills far outweigh the risk. But here are some frequently asked questions and answers about the controversy.

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Under the Affordable Care Act, many health insurance plans will provide free women’s preventive services, including mammograms, birth control and well-woman visits. Learn more.

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Does Taking Birth Control Pills Increase My Risk of Developing Breast Cancer?

Maybe. Studies that have examined the use of oral contraceptives as a risk factor for breast cancer have produced conflicting results. Some researchers think this might be due to the fact that the level of hormones in birth control pills has changed since they were first studied. Early birth control pills contained much higher levels of hormones than today's low-dose pills and posed a higher risk.

Scandinavian researchers have noted an increase in breast cancer in a group of women that were currently taking or had recently taken birth control pills. Longer use of the pill seemed to increase the risk. Similar research found that 10 years or more after women stopped using birth control pills, their breastcancer risk returned to the same level as if they had never used birth control pills.

However, another reputable study by Women's Contraceptive and Reproductive Experience (Women's CARE) done between 1994 and 1998 showed there was no increased risk of breastcancer in current or former users of birth control pills.

In general, most studies have not found an overall increased risk of breast cancer due to the use of oral contraceptives.

My Family Has a History of Breast Cancer. Should I Take Birth Control Pills?

Maybe. A study published in the Journal of the American Medical Association found that women with a strong family history of breast cancer may have up to an 11 times higher risk of breast cancer if they have ever taken the pill. But experts caution that the study involved mainly women who took birth control pills prior to 1975, when it contained much higher levels of the hormones estrogen and progestin than today's lower-dose pill.

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