In a study recently released, Danish researchers followed 1.8 million women aged 18-49. In Denmark there is universal health care and a common data base, which allows scientists to very accurately monitor health and disease causing activities. They found that the use of hormonal contraceptives resulted in 13 more cases of breast cancer per 100,000 women. N Engl J Med 2017; 377:2228-2239.
However, in reviewing the results, the journal mentioned that there are several limitations to the study; including not allowing for confounding factors such as family history, smoking, etc. As well, the risk of complications should a women have an unwanted pregnancy exceeds this excess risk.
Finally, in an editorial, the Journal pointed out that the copper IUD, and proper use of male condoms were as effective as the birth control pill and involved no hormones. Of course insurance coverage and education is important.
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