Sonogram question

Kelcie • I`m Kelcie! 20 year old mommy to an 8 month old girl.
Ok so I have state insurance and I'm waiting on the Doctor to call me back & tell me when my appointment is to get my first sonogram. I'm 30 weeks & this is my first sonogram due to insurance complications. Anyways, I was curious if they would allow me to have a 3D ultrasound or would my insurance only allow me to have it in 2D. Any moms have state insurance and are allowed 3D ultrasounds without having to pay out of pocket?