title: Reply.
authors.affiliation: Department of Development and Regeneration, Katholieke Universiteit Leuven, Department of Obstetrics and Gynecology, University Hospitals Leuven, Leuven, Belgium.
authors.forename: Wouter
authors.initials: W
authors.lastname: Froyman
authors.affiliation: Department of Obstetrics and Gynecology, Skåne University Hospital Malmö, Lund University, Malmö, Sweden.
authors.forename: Lil
authors.initials: L
authors.lastname: Valentin
authors.affiliation: Department of Development and Regeneration, Katholieke Universiteit Leuven, Department of Obstetrics and Gynecology, University Hospitals Leuven, Leuven, Belgium. Electronic address: dirk.timmerman@uzleuven.be.
authors.forename: Dirk
authors.initials: D
authors.lastname: Timmerman