I wholeheartedly believe it is genetic, with environmental triggers.
My DD sits on the borderline between autism and aspergers. She was induced with oxytocin. There was no issues with me or her during the pregnancy (no GD, or anything) the reason she was induced is because labour started and failed to progress. After 3 days of it starting and stopping constantly, i agreed to oxytocin inducement. She was healthy and happy in there and i probably should have just waited. But i was sick of it and wanted it to be over! Lol.
DS is NT, he was a spontaneous labour.
I think this a very interesting study. Particularly in view of oxytocin effects and the fact that it is emotion response that is affected in ASD. I realise it is early days and in the end we may not be any closer to an answer, but i think it is important to question and explore all possibilities.
Purely speculation, but it may lead to mothers with a family history of ASD being advised against use of oxytocin. It certainly seems safe enough in other women. Even at this stage in the research, it is enough for me to rethink my birth plan for bub#3 and refuse oxytocin.
I'll be following this with great interest