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A comment on Massive genetic study shows how humans are evolving. Parent comment

Re:Massive genetic study shows how humans are evolving by thrownblown on Sunday September 10, 2017 @04:37PM (#15214208)
mothers, even mothers who don't carry all the way to birth, get fetal cells, very similar to stem cells, that protect and repair their mothers, but can also trigger autoimmune conditions like lupus, or rheumatoid arthritis.

http://www.radiolab.org/story/205334-fetal-consequences/

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Re:Massive genetic study shows how humans are evolving by EGreg on Sunday September 10, 2017 @04:45PM (#15214244)
Apparently I was wrong - according to this

https://www.ncbi.nlm.nih.gov/m/pubmed/16510865/

But this study is contradicted by many studies

https://www.scientificamerican.com/article/having-sons-can-s...

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Re:Massive genetic study shows how humans are evolving by thrownblown on Sunday September 10, 2017 @04:50PM (#15214261)
the radiolab is from 2012, and i'm sure they've learned a lot since then, but they do mention that there are a lot of factors (sex of children, number of children, number of fathers) that correlate with both good and bad effects of the fetal cells.
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Re:Massive genetic study shows how humans are evolving by EGreg on Sunday September 10, 2017 @06:36PM (#15214666)
So which is it?

Do children at 20-30 increase or decrease life span?

Obviously people who live longer may have more children, especially the men. I am talking about the other way.

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Re:Massive genetic study shows how humans are evolving by thrownblown on Monday September 11, 2017 @03:33AM (#15216699)
The simple answer is its complicated. Having a child is stressful on the organism, but there are ultimately 2 types of stress eustress and distress.

Sometimes it's good sometimes it's bad. ¯\_(ツ)_/¯

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