“…Persistent pulmonary hypertension (PPHN) is intimately associated with the pathophysiology of cardiopulmonary distress in CDH. To predict severity of PPHN and clinical outcome, several parameters such as fetal lung to thorax area ratio [4], liver position [5], fetal pulmonary artery (PA) size [6,7], and postnatal PA size and blood flow [8][9][10] have been reported to be reliable, but most are only assessed at a single point in time either prenatally or postnatally, and their change over time is not usually evaluated.…”