title: Reply.
authors.affiliation: Department of Obstetrics and Gynecology, University of Parma, via Gramsci n 14 Parma, Parma 43126, Italy.
authors.forename: T
authors.initials: T
authors.lastname: Ghi
authors.affiliation: EMVRYO PCC, Thessaloniki, Greece.
authors.forename: A
authors.initials: A
authors.lastname: Sotiriadis
authors.affiliation: Division of Child Health, Obstetrics and Gynaecology, School of Medicine, University of Nottingham, Nottingham, UK.
authors.forename: N
authors.initials: N
authors.lastname: Raine-Fenning