An Atlanta doctor accused of medical malpractice told jurors on Friday he accidentally left the head of a fetus inside a woman who had miscarried

An Atlanta doctor accused of medical malpractice told jurors on Friday he accidentally left the head of a fetus inside a woman who had miscarried
I would be curious to see an opinion from an OB/GYN. What is the frequency of this complication? Is an ultrasound routinely performed afterwards to ensure there would be no retained parts of the fetus?