Fig. 2From: Massive ascites due to lupus peritonitis in a patient with pre-eclampsia and systemic lupus erythematosus: a case reportDoppler ultrasonography. The pulsatility index (PI) and resistance index (RI) of the umbilical artery (Umb) are within the normal ranges. The PI of the fetal middle cerebral artery (MCA) is at the lower limit of normal (5th percentile)Back to article page