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.
When do babies roll over? Babies can start rolling over as young as 3 to 4 months old, says pediatrician Deena Blanchard, MD, MPH, since it takes them a few months to build up the necessary strengthâincluding neck and arm muscles and good head controlâto pull off this physical feat.