title: Re: Angle of fetal head progression measured using transperineal ultrasound as a predictive factor of vacuum extraction failure.
authors.affiliation: Prenatal Zurich, Center for Fetal Medicine, Gladbachstrasse 95, 8044 Zürich, Switzerland.|Medical Faculty, Heinrich Heine University, Düsseldorf, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Tutschek
authors.affiliation: Charité, Campus Virchow, University Hospital, Berlin, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Braun
authors.affiliation: Obstetrics and Gynecology, University Hospital, Liège, Belgium.
authors.forename: F
authors.initials: F
authors.lastname: Chantraine
authors.affiliation: Charité, Campus Virchow, University Hospital, Berlin, Germany.
authors.forename: W
authors.initials: W
authors.lastname: Henrich
mesh_terms: D005260:Female; D006257:Head; D006801:Humans; D007746:Labor Presentation; D011247:Pregnancy; D014463:Ultrasonography; D016216:Ultrasonography, Prenatal; D014618:Vacuum; D014620:Vacuum Extraction, Obstetrical