title: Reply.
authors.affiliation: Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine, Baylor College of Medicine, Houston, TX. Electronic address: aagaardt@bcm.edu.
authors.forename: Kjersti M
authors.initials: KM
authors.lastname: Aagaard
authors.affiliation: Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine, Baylor College of Medicine, Houston, TX.
authors.forename: Maike K
authors.initials: MK
authors.lastname: Kahr