Over the past four decade, use of the contraceptive pill has vastly increased. The amount of estrogen that has entered the water supply as a result could be partially responsible for the increased incidence of prostate cancer around the world.
Excess estrogen is known to cause various cancers. The amount of estrogen excreted by an individual woman taking the Pill is minimal, but millions of women over extended periods of time could cause low-level environmental contamination.
MSN reports:
“[Researchers] compiled data on countries and continents around the world to see if there was any connection between contraceptive pills and prostate cancer. The researchers looked at some 100 countries and found that where the use of oral contraceptives was high, so was the rate of prostate cancer.”