A new report shows that fracking can have a dangerous effect on the human reproductive system. 

While it was known that fracking - the extraction of oil and gas through hydraulic fracturing of rock - may cause potential air and water pollution, this latest study led by biologist Susan Nagel, a researcher with the University of Missouri, and her colleagues, indicates the practice causes hazards to human reproductive organs.

"There are far fewer human studies than animal studies; however, taken together, the studies did show that humans can be harmed by these chemicals released from fracking," Nagel said. "There is strong evidence of decreased semen quality in men, higher miscarriages in women and increased risk of birth defects in children. There is a striking need for continued research on (unconventional oil and gas) processes and chemicals and the health outcomes in people."

Nagel is an associate professor of obstetrics, gynecology and women's health in the School of Medicine, and an adjunct associate professor of biological sciences in the College of Arts and Science at M.U.

Researchers examined more than 150 studies reporting on chemicals used in UOG operations, and concluded that there is cause for concern, according to Science Daily. Scientists found that exposure to the air and water pollution that UOG operations cause can lead to miscarriage, infertility, impaired fetal growth, semen quality and birth defects.

The study focused on the review of publications and literature that centered on the chemicals used in the fracking procedures. A higher percent of those chemicals was found in the water and air in the vicinity of the operations and was linked to health concerns.

Excerpts from the study were published in Environmental Health News.