The New South Wales Opposition says there have been more cases of women being mistreated in hospital during a miscarriage.
The Greater Western Area Health Service is investigating how a woman who was 23 weeks pregnant with twins recently miscarried in a toilet at Broken Hill hospital.
The revelation came just a week after the NSW Government promised an inquiry into the treatment of Jodie Whiteside, who was 14 weeks pregnant when she miscarried at Maitland Hospital.
Sydney man Gary, who does not want to give his surname, says his wife was 12 weeks pregnant when she went to the Prince of Wales Hospital in December.
Both Gary and his wife are nurses and he says she was clearly having a miscarriage but was told to go home.
Opposition health spokeswoman Jillian Skinner says it is not an isolated case.
"She came forward because she wanted it known that this was not isolated, this was not just in one hospital," she said.
"The thing that's important about this last case is that the woman is a nurse, her husband a former nurse and they said that they were horrified by the treatment they received in the emergency department at Prince of Wales."
The Greater Western Area Health Service says it extends its sympathies to the family and is conducting an internal investigation.
Last year, a parliamentary inquiry was held into the treatment of Sydney woman Jana Horska, who miscarried in the toilets at Royal North Shore Hospital in September 2007.