Antenatal/birth choices - autism prevention?

[RockinSockBunnies]

So, as I spend far too much time trying to pinpoint what caused DSS's autism, and why there are so mnay autistic children around now, I came across the following article online about steps a woman can take prior to getting pregnant to reduce the odds of having an autistic child.

Since I'm planning to have children with DP in the next few years (I have DD, 10, NT, from previous relationship) I am researching, as much as possible, various ways as to minimise the risk of having a child with ASD.

www.ageofautism.com/2010/03/what-can-be-done-to-prevent-autism-now.html

Can anyone comment, in any way, as to its merits? Has anyone had a child/children with ASD and a subsequent NT child, having made lifestyle changes?

Is there anything you would do differently prior to conceiving if you were to have more children?

Or is it totally down to chance?

Thank you

Quite interested to read that it says there is no research to prove that ultrasound is safe.
My first two children were born in 1975 and 1976, and ultrasound was not routinely available. They are both NT.
By the time DS2 was born ultrasound was routine, and I had a couple of extra scans because he was breech. He was always different from the other two and was diagnosed at 12 with Aspergers. I always wondered whether ultrasound was the trigger.

I had scans every week to monitor amniotic fluid.

I suppose I am like the people who refuse to believe MMR is safe then. You get the idea in your head and it is hard to shift. MMR clearly doesn't cause autism in all children but there are some people who think it is a trigger for susceptible children. I feel the same about ultrasound.

zzzz....a common story I think.

I don't think there is anything that you can do to prevent it. At least, not that we are aware of anyway. The geneticist told us that she saw an awful lot of autistic children who were the result of complicated pregnancies or births but there was no specific marker which you could said "caused" or contributed to developing autism.

In my case, I had non-identical twins. One is NT, one is ASD. I developed pre-eclampsia and the boys were born a month early. They were both classed as IUGR although they quickly caught up. You would assume that the smaller twin would be more likely to have ASD because he was more affected in utero, whereas in actual fact, its the larger twin (who was born first) who has ASD. Genetics must have an awful lot to do with it.

Now pg with DC3 and I am worried about developing pre-e again given our history, but there is nothing I can do about it and even if I do develop it, it doesn't necessarily mean that it will result in DC3 also being autistic.