A new study from the University of Utah School of Medicine in Salt Lake City, and published in Pediatrics, helps confirm earlier findings that babies born in the breech position or to older mothers are substantially more likely to develop an autism spectrum disorder. As reported on Independent.ie :
Psychiatrists from the University of Utah School of Medicine in Salt Lake City compared medical records for 132 children with autism with those of 13,200 children without the disorder who were also born in 1994. They found that autism was twice as common in babies who weren’t born head-first and 68 percent more common in those born to mothers older than age 34.
When studies such as this are publicized it is hard not to look at your own autistic child's delivery. His mom was not over 34 at the time but Conor was a breech baby, delivered by cesarean section.