860: The impact of universal cervical length screening on the optimal timing of antenatal corticosteroid administration

To assess if universal screening for cervical length (CL) has an impact on timing of antenatal corticosteroids (ACS). Retrospective case control study of singleton gestations who were found to have short CL on routine anatomy ultrasound between October 2012 and April 2014 and had a subsequent preterm birth (PTB) between 24-34 weeks gestational age (GA). Matched controls were all women with singleton gestations who had spontaneous PTB within the...