Below is something I came across re: infanticide among today's hunter-gatherers. No guarantee that Paleo behavior was the same, but it seems to match the findings of Paleoanthropologists about Paleo infanticide.
Infanticide among the !Kung Bushmen
From Before the dawn: recovering the lost history of our ancestors By Nicholas Wade, April 20, 2006, p. 68:
"A family's total possessions--tools, ostrich shell canteens, children's toys, musical instruments--pack into two bags. Nothing is stored, since everything they need is obtainable from the environment. Portability imbues !Kung life so thoroughly that it affects even the spacing of children. A woman can carry one child easily along with all her possessions, but two are a burden. !Kung women tend not to have a second child until the first can walk well. Children are not weaned until the age of four and before that age are carried almost everywhere, whether on foraging trips or when moving camp. Lee calculates that !Kung women walk about 1,500 miles a year, at least half of this distance carrying substantial burdens of food, water or possessions. A !Kung mother carries her child a total of 4,900 miles before it walks by itself.
Perhaps because a woman must invest so much care and labor in raising a child, she examines her newborn carefully for signs of defects. 'If it is deformed, it is the mother's duty to smother it,' writes the demographer, Nancy Howell. Infanticide is not the same as murder, in the !Kung's view, because life begins not with birth but when the baby is taken back to camp, given a name and accepted as a Real Person. 'Before that time, infanticide is part of the birth mother's prerogatives and responsibilities, culturally prescribed for birth defects and for one of each set of twins born,' Howell says. Women give birth outside the campe and men are excluded by taboo from the birth site; the reason for the taboo is doubtless that the father's absence makes easier the mother's decision as to whether to keep the newborn."
