I did had some of my visit with student doctor present through some of my consultation but not during labour neither ultrasound.
But, during this few check up, they did ask if we are comfortable and therefore they will waived charges (some visit not all) I had student doctor usually will do QnA, hear heartbeat and they will do "practice" on me with senior doctor with them.
So far so good, no issues. We learn both ways from the junior/senior doctor.
itsallabout_mytwokids