When the lights go down in the delivery room: Lessons from a ransomware attack.

Objective: To describe the challenges facing the obstetric division following a cyberattack and discuss ways of preparing for and overcoming another one.

Methods: A retrospective descriptive study conducted in a mid-sized medical center. Division activities, including the number of deliveries, cesarean sections, emergency room visits, admissions, maternal-fetal medicine department occupancy, and ambulatory encounters, from 2 weeks before the attack to 8 weeks following it (a total of 11 weeks), were compared with the retrospective period in 2019 (pre-COVID-19).