A continually growing number of studies have associated fracking and other shale gas extraction processes with cancer and serious health threats to almost every system in our bodies. Expectant mothers and infants seem especially vulnerable to premature birth, low birth weights, and congenital heart and brain defects. Risks for childhood leukemia, asthma and other respiratory diseases increase. Many of the chemicals used in fracking can disrupt our hormone systems, and cause developmental and reproductive problems lasting a lifetime. Reviewers of all the medical research have stated that they can see no way for the industry to operate safely as regards public health.