TIL that there is a phenomenon that soldiers who returned from wars are more likely to father sons than girls leading to an effect that during war times more boys than girls are born. This is called the "Returning Soldier Effect" and the reason for that effect is still not 100% clear.

TIL that there is a phenomenon that soldiers who returned from wars are more likely to father sons than girls leading to an effect that during war times more boys than girls are born. This is called the "Returning Soldier Effect" and the reason for that effect is still not 100% clear. https://onlyfunfacts.com/history/war/the-returning-soldier-effect/ genderbender69 January 31, 2020 at 05:58AM