>>82142312
Nah, prehistoric times all rival's offpsring would get killed. In times where you arent sure where the next meal comes from you dont want your own offspring to have to share with the guy you killed's spawn.
And you sure as hell won't wait 16 years till the menarche (first menstruation age used to be higher especially when food isnt abundant) when you could just make more babies of your own. Women can always be imported, which is what we can observe happened during that time. Male dna stayed close to the tribe, female dna could come from far and wide.
Im just saying that this practice went away when civilization hit, though at that point it would be the women themselves killing their kids. Often you'd prefer a son since a daughter would be more fragile to raise, and more costly if you lived in a dowry culture instead of a brideprice culture.