The class members include Barwin's former patients who allege they were artificially inseminated with sperm belonging to the wrong donor, in some cases the doctor's own sperm.

The committee revoked Barwin's licence this afternoon, which means other medical regulators would be alerted should he apply to practise medicine elsewhere.

An Ontario doctor once suspended for inseminating women with the wrong sperm at his fertility clinic is now accused of allegedly using his own biological material to impregnate certain patients who came to him for treatment.