623. Sx chorioamnionitis / Studies to rule out chorioamnionitis / How to rule out placenta previa November 6th, 2008 by reuben in pregnancy Back Top Tags: card 622. Factors to consider in the management of PROM / How to determine fetal lung maturity / If lungs are immature, can rx with 624. Management of placenta previa / In what % of placental abruptions is bleeding concealed? / Diagnoses that should be made with caution if abruption is in the ddx / Ability of ultrasound to rule out abruption Leave a Reply Cancel reply Please post any discussion to the emupdates Reddit page.