title: Reply.
authors.affiliation: Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Sidney Kimmel College of Medicine at Thomas Jefferson University, Philadelphia, PA.
authors.forename: Alexis C
authors.initials: AC
authors.lastname: Gimovsky
authors.affiliation: Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Sidney Kimmel College of Medicine at Thomas Jefferson University, Philadelphia, PA. Electronic address: vincenzo.berghella@jefferson.edu.
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Berghella