For a person living all their life in fear (and that is all in the mind), such as a permanent war, their bodies would be flooded with hormones all the time to cope with that, like cortisol and adrenaline. What would that do epigenetically? & what mutations would occur over time and win out? Difficult to see research on that, and with commensurate "controls". It is known that during the NI "Troubles" more male babies were born than usual. My Bro-in-Law reckoned that was due to copulation being less regular, more opportunist with males off to fight and popping home occasionally. And the probability of when in the menstrual cycle fertilisation occurs. I would still ask if cortisol etc would factor-in. The effect was small but significant, the statistics were robust.
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