Wrong again
Didi Kisten Tatlow in the New York Times, Navigating Child Policy in China:
To avoid gender-based abortions, fetal ultrasounds are illegal in China and she had never seen her first child on an ultrasound.
No, they are not illegal. It is illegal to use them to tell the sex of the fetus. The hospital will gladly give you an ultrasound if the equipment is available and you can pony up the cash/insurance/社保卡, but the nurse administrating the procedure is prohibited by law from telling you what she sees "down south."
This is why Americans' view of China is stuck in the 30-years-ago.