Vaginal delivery of vertex-first nonvertex second twins demands that the obstetrician is prepared to solve critical situations involving a nonengaged second twin.
From the Departments of Prenatal Medicine and Perinatal Medicine, Center for Mother and Child, University of Marburg, Marburg, Germany, in cooperation with the Clara Angela Foundation, Witten, Germany.
Corresponding author: Prof. Birgit Arabin, Department of Prenatal Medicine, Center for Mother and Child, University of Marburg, Germany Baldinger Str. 1 35033 Marburg, Germany; e-mail: firstname.lastname@example.org.
Financial Disclosure The authors did not report any potential conflicts of interest.