High blood flow through umbilical cord?

Olive 🦋 • Wife, writer, stay at home mommy to Luna Violet and Kodiak Sage 🌑🐻
So my last two appointments this has shown up. I'm 31 weeks, and my baby is measuring small in her torso, and also has elevated blood flow. They have me going in every week for u/s and nsts, but I just want to know if anyone else is experiencing this?