Researchers have found a connection between urinary concentrations of Bisphenol A, or BPA, and decreased sperm quality and quantity. The results of the study show that the sperm concentrations of men with the highest concentrations of BPA were 23 percent lower on average with a 10 percent increase in sperm DNA damage. According to the study's lead author, "Much of the focus for BPA is on the exposures in utero or in early life...but this suggests exposure may also be a concern for adults."