What was the age of first reproduction in the stone ages (forager—hunter gatherer) and before?

Question

Also, any sources would be helpful

Answer 1

Sorry, don’t have references at my fingertips, but recall that caloric intake helps trigger puberty and 75,000 calories are needed to gestate a new human. Best guess is that puberty would have been unlikely for human females before being aged 16-18 prior to the Neolithic.