title: Re: Rational and irrational ratios.
authors.affiliation: Department of Obstetrics, Charité Universitätsmedizin Berlin, Charitéplatz 1, D-10117, Berlin, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Verlohren
authors.affiliation: Department of Obstetrics, University of Leipzig, Leipzig, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Stepan
mesh_terms: D003627:Data Interpretation, Statistical; D006801:Humans; D011296:Prenatal Diagnosis