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Doppler‐echocardiography‐derived spectral tracings in middle cerebral artery (MCA) (a), umbilical artery (UA) (b) and ductus venosus (c) obtained from fetal lamb on EXTEND support. Patterns appear similar to those acquired in utero in normal fetal lamb. Note abundance of diastolic flow seen in UA as compared to MCA, thus resulting in higher pulsatility in MCA than in UA, as in normal in‐utero state.
