Before revision: Face presentations are classified according to the position of the chin (mentum): Left Mento-Anterior (LMA), Left Mento-Posterior (LMP), Left Mento-Transverse (LMT) ; Right Mento-Anterior (RMA), Right Mento-Posterior (RMP), Right Mento-Transverse (RMT) ; Brow presentation While some consider the brow presentation as an intermediate stage towards the face presentation, others disagree.
After revision: Face presentations are classified according to the position of the chin (mentum): Left Mento-Anterior (LMA), Left Mento-Posterior (LMP), Left Mento-Transverse (LMT) Right Mento-Anterior (RMA), Right Mento-Posterior (RMP), Right Mento-Transverse (RMT) Brow presentation While some consider the brow presentation as an intermediate stage towards the face presentation, others disagree.