zinfamous
No Lifer
- Jul 12, 2006
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Just dropping this here...
http://www.utswmedicine.org/stories/articles/year-2015/assets/birth-rates-full.jpg
http://blogs.nature.com/news/files/Autism rate table.jpg
Chances of autism go up as mothers are older. Nothing fancy or catchy about it. Just simple stats that women really shouldn't be having kids into their late 30's and 40's. Lots of statistics start working against you.
I haven't looked into it directly, but it seems to me that IVF, which you will both find more predominantly in older mothers, as well as mothers/fathers with various other conception issues has a significant role. I think it was ~1971-73 when IVF became valid?
Since then, I think it is something like 10-20 million babies born through IVF; A population that would have been "selected against" genetically if not for technology. It is also the mid-late 80s, right? when the diagnosis became more refined and the instances of autism skyrocketed.
This isn't an issue of technique (PMSG/HGS injections or whatever), merely a conceptual argument that you are now "creating" a population of individuals that, for various reasons, were not generally biologically viable. I actually looked into this briefly ~year ago due to curiosity, but I only found studies testing the technique of IVF and found no links. But nothing seemed to address the genetic toll potentially being placed on the population.
Of course, all of these advances have allowed for greater instances of AMA (Advanced Maternal Age), so either it's simply due to age or a part of that mixed with transcending previous barriers to fertility, we are essentially creating a significant population of humans that would have not previously existed due to natural selection.
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