In twin pregnancy, Vaginal delivery is contraindicated in
Monochorionic monoamniotic
First twin veex, 2nd breech
Second twin transverse
First twin Mentoanterior
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
Twin Pregnancy, Molar Pregnancy, Gestational Trophoblastic disease and contraception in special situations (Sour Grapes!)