What abbreviation is used to tell the crown-to-rump size of the baby in your ultasound?

Answer by  Kim23 (145)

The abbreviation for the crown-to-rump size of the baby is CRL - Crown to rump length or Head to Bottom.

Answer by  Jenna16 (224)

The abbreviation for this measurement is CRL, or crown to rump length. This is how babies are measured as they are in a curled position for quite some time. However, all of the numbers on your ultrasound probably do not have to do with the baby, but rather, the machine.