I'm not really sure that I buy this. I know a ton of people with closely spaced pregnancies (including me and 2 of my siblings, we're each about a year apart) that don't have autism, and most of the kids with autism that I know/have worked with are first kids/pregnancies. But it is an interesting guess. Thanks for sharing.
Me (29) DH (30)
#1-Olivia Caetlyn-9-28-09-9-28-09, 23+2 wks, emergency classic c-section, class I HELLP, IUGR
#2- Lucas Oliver (rainbow baby)- April 2011, 36+2 wks, HELLP and pre-e free! (lovenox and LDA pregnancy)
#3-Matthew, late October 2012...mostly normal, 37 wks, (lovenox and LDA again)
My blog: http://www.butterflies-and-rainbows.blogspot.com/