A fertility doctor who inseminated up to 100 women with his own sperm has been fined $10,000.

A fertility doctor who inseminated up to 100 women with his own sperm has been fined $10,000.

Dr Norman Barwin, who ran Broadview Fertility Clinic in Ottawa, Canada, gave patients his own sperm instead of that of a donor or their partner, or mixed up samples.

The misconduct, which dates back to the 1970s, was uncovered after one of the children became curious about her heritage and got a genetic test while a second developed celiac disease, a genetic condition that neither parent was a carrier for.

The 80-year-old has been found to be the biological father to at least 16 children.

Describing his actions as 'appalling' and 'reprehensible', the College of Physicians and Surgeons of Ontario said he 'betrayed patients trust'.

'Your actions deeply affected individuals and their families and caused irreparable damage that will span generations', they said in their decision.

Rebecca Dixon told the hearing that she felt 'repulsed' and 'contaminated' when, at the age of 25, she learnt that Barwin was her biological father.

'In that moment, my life changed forever,' she said in a victim impact statement.

'For a while I felt dissociated with my own face, as if the person looking back at me in the mirror wasn't fully me anymore.'

Her father, while struggling with major health issues, 'had to learn to accept that the daughter he had raised and loved was not in fact his biological child,' she said.

'My mum,' she added, 'had to work through the fact that something had happened to her body without her knowing, or giving her permission.'

In family portraits her brown eyes and olive skin stick out compared to her parents pale complexions.

After learning he is not Rebecca's biological father, her father Dan said his world had been 'turned upside down'

'Rebecca is our child, but she's not our child. She is, but she's not.'

Another patient said she still hadn't told her teenage daughter that her father isn't her biological father, reports the Ottawa Citizen.

'I felt so violated, I felt dirty, almost as though I had been raped', she said.