I found this thread when doing a search for links between rh negative mothers and sensory processing disorder. I am rh negative and my nearly 5 year old son has just been diagnosed with sensory processing disorder. I also suspect he may be autistic. I had an anti-D injection while I was pregant with him and I have read that there are theories that this may be a possible cause of SPD/SID and autism. I think this is definately an area of reasearch to keep a close eye on in the future!