A new study seems to contradict previous findings that the pill decreases the risk of ovarian cancer, and can instead double the risk if used for more than 9 years. The study was only on current users of the pill, and more research is needed to see if the risk drops once the use of the pill is stopped. However, the study was done with very little information, and the research needs to be broadened for the evidence to be conclusive. Extended use of the pill is already fairly firmly linked with an increased risk of breast cancer.
I wonder what massive hormonal changes (Zolodex, Lupron, the 3 yearly pill, etc) do to the risk of cancer (cervical, ovarian and breast)?