The Taoiseach will apologise on behalf of the State in the Dail later to the survivors of Mother and Baby Homes.
A Commission of Investigation found there was an appalling level of infant mortality in the homes and thousands of women and children were shamed and stigmatised.
Micheál Martin described the report as harrowing and said society did this to the women and children.
But Historian Catherine Corless says those comments have caused a lot of hurt.