Amy Delahunt from Borrisoleigh and her partner Ollie Kelly together with Offaly couple Roisin & Mark Molloy will talk about their experiences and give their response to the damning HIQA report on maternity services at the hospital.
Later, the head of the HSE Tony O'Brien and other senior management will be questioned by committee members about the issues raised in the HIQA report.
Committee chair deputy Jerry Buttimer has paid tribute to the parents for highlighting serious issues at the hospital.
It's emerged medics had alerted both the HSE and the Department of Health to critical risks at Portlaoise hospital four years ago.
Senior doctors, midwives and management in the Coombe hospital in Dublin and Mullingar and Portlaoise hospitals had outlined the serious need for more resources to tackle inadequate staffing and training in a 2011 report.
In their application for funding, seen by the Irish Times, they proposed the appointment of additional obstetricians and improved ultrasound and bereavement services.
These measures are now being implemented in the wake of the damning HIQA report into maternity services at Portlaoise Hospital.
