title: Reply.
authors.affiliation: Department of Obstetrics and Gynecology, Sahlgrenska University Hospital, Gothenburg, Sweden. Electronic address: katja.bohlin@vgregion.se.
authors.forename: Katja Stenström
authors.initials: KS
authors.lastname: Bohlin
authors.affiliation: Department of Obstetrics and Gynecology, Sahlgrenska University Hospital, Gothenburg, Sweden.
authors.forename: Maud
authors.initials: M
authors.lastname: Ankardal
authors.affiliation: Department of Obstetrics and Gynecology, Sahlgrenska University Hospital, Gothenburg, Sweden.
authors.forename: Ian
authors.initials: I
authors.lastname: Milsom