Wait...WHAT?

This is false @npr.

Most we use M-mode ultrasound for fetal heart tones...this mode measures MOTION, not electrical activity. In fact, ultrasound doesn't measure electricity at all.

It is literally detecting motion. https://t.co/ImRJ0Cl3Gn https://t.co/RK0SMJs4AM

— Pradheep J. Shanker, M.D. (@neoavatara) September 5, 2021