and by sanofi, a diversified global health care leader.iscovers, develops, and distributes therapeutic solutions focused on patients' needs. we work to prevent and treat the diseases that we know of today, as well as those we may face tomorrow. additional funding provided by: vertex pharmaceuticals. and by biogen idec. >> mcfarland: welcoming a new baby into the world can be a precious and beautiful time for many families. but if the delivery comes too early in the pregnancy, that special moment can begin a physically and emotionally challenging journey for both the parents and the child. >> go, baby. come on, push, sweetie. >> mcfarland: babies delivered after 37 weeks are considered full-term. a full-term pregnancy provides the best opportunity for a mother to deliver a healthy baby. >> well, it's important that a woman achieve term, or deliver at least at 37 weeks of gestation to ensure that the fetus is mature. >> mcfarland: dr. ashley roman is a clinical assistant professor in the department of obstetrics and gynecology at nyu langone