Estrogen has been detected in streams, lakes and even drinking water. To determine its effect, researchers exposed killifish to synthetic Ethinylestradiol, found in most birth control pills. They found the number of offspring reduced and more females born than males.
‘When women on birth control or hormone therapy go to the bathroom, it gets flushed into wastewater treatment plants,’ said biologist Latonya Jackson (right)
Least killifish produced fewer offspring after being exposed to less than a tenth of the estrogen concentration found in some streams near sewage plants