Is 5% a Normal cephalic index?!

Haylie

I just went back through my measurements for our 21 week growth scan we had and I noticed the cephalic index looked super low (5%). What was everyone else’s around this time? Our baby’s umbilical cord has a defect, so he’s at risk for IUGR and I’m just wondering if this 5% is something I should worry about. We have another growth ultrasound next week on the 17th.