ABSTRACT
The optimum route of delivery of multiple gestations has long been a matter of controversy1,2. Even in an era of emerging sets of population-based data, the role of elective cesarean delivery for certain subsets of twin gestation is still debated. Simply stated, any delivery plan for twins requires consideration of the varied possible presentations for twin A and twin B. Figure 78.1 illustrates these varied combinations, whereas Figure 78.2 illustrates a useful clinical classification of twin presentations. Here all combinations are classified into three groups3:
(1) Twin A, vertex with twin B, vertex (42.5%);
(2) Twin A, vertex with twin B, non-vertex (38.4%);
(3) Twin A, non-vertex (19.1%).
