title: Reply of the authors.
authors.affiliation: Arbor Vitae Centre, Rome, Italy.
authors.forename: Ivan
authors.initials: I
authors.lastname: Mazzon
authors.affiliation: Department of Obstetrics and Gynecology, University of Perugia, Perugia, Italy.
authors.forename: Alessandro
authors.initials: A
authors.lastname: Favilli
authors.affiliation: Department of Obstetrics and Gynecology, University of Perugia, Perugia, Italy.
authors.forename: Sandro
authors.initials: S
authors.lastname: Gerli
mesh_terms: D005260:Female; D006801:Humans; D007434:Intrauterine Devices / Q000592:standards*; D011247:Pregnancy