Influence of chorionicity in intra-partum management of twin deliveries.

Objective: To analyze morbidity and mortality in twin pregnancies as a function of the type of delivery and chorionicity.

Design: Retrospective cohort study.

Methods: Analysis of the type of delivery, intertwin time interval, and perinatal variables of >1000 twin deliveries during a 10-year period.

Atosiban vs. ritodrine as a tocolytic in external cephalic version at term: a prospective cohort study.

Objective: To compare the success rate of external cephalic version (ECV) at term using ritodrine or atosiban as a tocolytic agent.

Study Design: Prospective cohort study with a sample of 236 pregnant women with a breech presentation at term, from November 2006 to March 2008. Data have been analyzed from the moment the cephalic version is performed until the time of delivery.