What Is It? Marfan syndrome is a genetic (inherited) disorder that affects the body's connective tissue. Connective tissue is the tough, fibrous, elastic tissue that connects one part of the body with another. It is a major part of tendons, ligaments, bones, cartilage and the walls of large blood vessels.
Your baby's first step toward mobility isn't actually a step at all -- it's a roll. When she's about 2 or 3 months old, she may flip from front to back. During tummy time (which you should supervise), your baby may lift herself into a push-up position and then start to rock back and forth or kick her feet. Then, if she's strong enough, those movements will send her rolling over.
Previously, the AAP advised parents to keep kids rear-facing as long as possible, up to the maximum limit of the car seat, and this has not changed. But it also cited one year and 20 pounds as the minimum for flipping the seat, which many parents and pediatricians interpreted as conventional wisdom on the best time to make the switch.