Certain forms of birth control can be linked to a lower risk of some cancers. Research done in the article says that birth control pills can reduce ovarian cancer risk by up to 50%. This research was done by the National Cancer Institute, an official government website, which I checked and had the same findings. Similarly, hormonal IUDs may help prevent or even treat early-stage cancers, which I also found to be true at the Memorial Sloan Kettering Cancer Center's official website