My boys are almost 4 months, 10 weeks adjusted. They are identical but one was IUGR and still about 2.5 lbs lighter. He also seems to be a little behind developmentally. He will smile and sometimes laugh but his brother is much more aware of his surroundings, watches his twin and has been rolling over for a month. I know every baby is different but I can't help being a little concerned. Is it normal for one to lag behind a bit, even for IDs?
Re: Developmental Differences