My baby was born at 39 weeks. I had a friend who had her baby at 42 weeks and her baby was born two weeks before mine. Since her babe had longer in the womb and is also two weeks older, would that mean her baby is 5 weeks ahead in milestones? I got that number because her baby was in the womb 3 weeks longer than mine and is 2 weeks older. Am I wrong? Her babe seems to just be a little ahead on everything... crawling, standing, saying mama and dada.