Only 2 ultrasounds for 9 months?!

Kaitlin • my sweet boy 💙

This is my first pregnancy. I was just informed by the OB that I will only receive two ultrasounds, one to confirm pregnancy and how far along I am (already done) and I have one more at 20 weeks to see the sex of the baby.

Is this normal or do I need a new doctor??? How are they supposed to know if baby is the right size and such.

Update: thank you so much for your responses ladies