Two studies out this week warn about possible long-term health consequences of taking birth-control pills. But does that mean the pill is dangerous? Heidi Ledford takes a look at why it?s so hard to get a straight answer.
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Collaborative Group on Hormonal Factors in Breast Cancer. Lancet 347, 1713-1727 (1996).
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Hannaford, P.C. et al. Br. Med. J. doi:10.1136/bmj.39289.649410.55 (2007).
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National Cancer Institute: Oral Contraceptives and Cancer Q&A
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Ledford, H. Contraceptive risks. Nature (2007). https://doi.org/10.1038/news.2007.234
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DOI: https://doi.org/10.1038/news.2007.234
