There’s more to tracking your baby’s development than logging height and weight. There are a number of other childhood milestones to keep watch for. Pediatrician Michelle Bailey, MD, medical director of Duke Health Center at Southpoint, says you can look for signs of emerging motor and language skills in the very first months of your baby’s life. “Babies begin to vocalize around 1 month. “At 3 months, they should push their head up when they’re on their stomach. By 4 months, they chatter in response to you and squeal with laughter.” It......