Could Some Forms of Autism Actually Be Caused By the Environment?
First they blamed the moms. Then they blamed the vaccines. Now research is showing that some cases of autism spectrum disorder (ASD) may actually be environmentally-caused. The findings, according to newswise.com, "shed light on why older mothers are at increased risk for having children with ASD and could pave the way for more research into the role of environment on ASD." The U.S. Centers for Disease Control and Prevention announced in March that one in 68 U.S. children has an ASD—a 30 percent rise from 1 in 88 two years ago. A significant number of people with an ASD have gene mutations that are responsible for their condition. But a number of studies—particularly those involving identical twins, in which one twin has ASD and the other does not—show that not all ASD cases arise from mutations, the Web site reports. Other studies have shown that genes may only be responsible in half the cases of ASD diagnosed, newswise notes. Media reports on the caus