Hydraulic Fracking and Testosterone (IMAGE) University of Pennsylvania School of Medicine Caption Past studies have shown that fracking chemicals could cause infertility, cancer, and birth defects. According to data compiled from a new tool developed at Penn Medicine, a disproportionately high number of wells in Pennsylvania, Illinois, and Ohio contain chemicals that target testosterone-pathways in the human body. Credit Penn Medicine Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.