For the first time, researchers have detailed the real impact of the so-called "Unfortunate Experiment" on women with cancer.

Otago University has made its final report on the unethical clinical study at National Women's Hospital in Auckland, conducted by Dr Herbert Green from the 1960s to the 1980s.

Previous reports had focused on how doctors withheld treatment from around 200 women with cervical pre cancer without their permission.

The new report has revealed that the regime of withheld treatment also included 82 women with microinvasive, or Stage 1A, cervical cancer.

Fifteen of those women developed a more advanced stage of cancer, and eight died.

One of the study authors, Professor Ron Jones, says it's important the event's not swept under the carpet.

"We felt we had a responsibility or a duty to report the outcome so the world knows because there are still some people who are in denial."

He is calling on the tertiary institute to issue an apology.

"We're still waiting for the University of Auckland to give an apology, who was the employer of the doctors who were involved in the experiment."

He said it's hard to believe something like this happened.

"We wanted the truth to prevail and I think that's happened with the series of papers that we've written on these unfortunate women."