My little girl is 7 months and doesn't go more than 5/6 hours between feeds (it's mostly 4-5 hours), she was 5lbs at birth and I'm wondering if this has anything to do with it? She's about 13lbs now. It could be a lot worse but most people I know have babies who sleep for longer at an earlier age. She's combination fed (mostly breast, she only has about 7oz of formula now) and I'm not sure whether it could be due to breastfeeding (friends whose babies still wake tend to be breastfeeding). If you had a low birth weight baby, did they take longer to sleep through? x