Yes, it is always possible that if you turn things around between now and then (and it sounds like you're off to a great start), they won't remove your latest child. However, it is equally possible they will want to keep all siblings together, even though the youngest will need considerable care. If you plan on breastfeeding that might be another argument in your favorite as to why the baby should stay with you to start life as healthy as possible. Best of luck!
