Placental Thrombus After Maternal COVID-19 Infection: A Case Study

A 34-year-old patient developed an area of thrombus within her placenta. This resulted in severe fetal growth restriction which physicians felt was due to contracting and recovering from the coronavirus disease (COVID-19), during her pregnancy. Serial sonograms demonstrated a slowing of fetal growth and an area of thrombosis within the placenta. This was confirmed by pathologic examination of the placenta after delivery. Since COVID-19 and pregnancy are both known hypercoagulable states, it is vital for the ultrasonographer to recognize thrombosis in the placenta. It is also important to understand the possible pregnancy outcomes, based on the location and appearance of a nonvascular placental lesion.