When vasa praevia is diagnosed acutely at the time of membrane rupture with fetal hemorrhage, delivery must be achieved via _____ caesarean section.

The lecture recommends **emergency caesarean section** when vasa praevia is diagnosed at rupture of membranes because fetal mortality is high. This contrasts with antenatal diagnosis, for which the lecture advises planned elective caesarean delivery at 35 weeks.\n\n**Key takeaway:** The timing and circumstances of diagnosis determine whether delivery is planned or an emergency.\n\n**Glossary:** **Rupture of membranes**: Breakage of the amniotic sac; **emergency caesarean section**: Urgent surgical delivery.