<prompt> In twin pregnancy, Vaginal delivery is contraindicated inMonochorionic monoamnioticFirst twin veex, 2nd breechSecond twin transverseFirst twin Mentoanterior  <response>: Monoamniotic twins are at a great risk of developing cord accidents like entanglement which can lead to sudden fetal death. Therefore all monoamniotic twins have to be delivered by a Cesarean sections between 32-34 weeks , after ensuring lung maturation 