Lawyers in favour of the Eighth Amendment being retained in the constitution have said repeal will result in abortion on request up to six months under the Government's planned legislation.

Barrister Benedict Ó Floinn criticised comments by the Fianna Fáil leader, who spoke at a Lawyers for Yes event on Wednesday.

Micheál Martin rejected the suggestion that a Yes vote would lead to unlimited or late term abortions and that the limits and regulations proposed in the legislation can't be trusted.

Mr Ó Floinn said Mr Martin was wholly mistaken.

He said it was open to the Government to recommend an amendment of the article in the Constitution, instead of repealing it and to introduce legislation addressing exception cases.

"They didn't do that, instead they yielded to those who wanted the rights of the unborn completely swept away and a wide-ranging right to abortion put in its place," he said.

Mr Ó Floinn called on Mr Martin to debate the matter with lawyers on the No side.

Meanwhile the Psychological Society of Ireland, which favours repealing the Eighth Amendment, has released two papers which it says "counters false facts that are not based on scientific research".

In its Five facts on the Eighth Amendment and Mental Health paper, it says women who choose abortion do so because of the negative effects of continuing the pregnancy on their mental health and that of their existing children and others.

It says that the majority of women report feelings of relief after an abortion and those who maintain feelings of regret over time are affected mostly by societal stigma and a lack of social support.

Professor Brian Hughes of the PSI Science and Public Policy Committee says the society is convinced that the scientific research literature shows clearly that women would be best served if the Eighth Amendment is removed.

"The highest-quality research has demonstrated little to no negative mental health outcomes in women who have had abortions. In fact, the research shows that the prohibition of abortion is itself a risk-factor for adverse mental health."

Separately in Drogheda, Renua Ireland, which is the only political party campaigning for a No vote as a whole, held a briefing regarding people with disability in the context of the Referendum on the Eighth Amendment.

Its leader John Leahy said the most disgraceful feature of the referendum is that it introduces "a new attitude that has seen people with Down Syndrome eliminated from the social landscape".

Maria McCabe, who is a disability rights activist in Drogheda, told the press conference that she would be voting No.

"I'm a person with a disability and people with disabilities need to be protected and their lives," she said.

She said there is support for children with Down Syndrome or babies with spina bifida.

"There is support out there, there wasn't 30 years ago when I was born, but there is now," she said.