title: Reply.
authors.affiliation: Department of Gynecology and Obstetrics, Tampere University Hospital, Tampere, Finland. Electronic address: minna.maenpaa@pshp.fi.
authors.forename: Minna M
authors.initials: MM
authors.lastname: Mäenpää
authors.affiliation: Department of Gynecology and Obstetrics, Tampere University Hospital, Tampere, Finland.
authors.forename: Kari
authors.initials: K
authors.lastname: Nieminen
authors.affiliation: Department of Gynecology and Obstetrics, Tampere University Hospital, and School of Medicine, University of Tampere, Tampere, Finland.
authors.forename: Johanna U
authors.initials: JU
authors.lastname: Mäenpää