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.
Most babies can roll over by the time they are six months. If your baby is not rolling over, at least from front to back, by the time he is six months you should discuss this with your doctor.