THOUSANDS of people have gathered at Dublin's Parnell Square ahead of the march and rally outside Leinster House organised by the Pro-life movement.
It's the third major gathering in recent months and the first since four Fine Gael deputies were expelled from the party for failing to support the Government's controversial abortion legislation this week.
The 'All-Ireland Rally for Life' was expected to be addressed by a number of speakers including the founder of the Libertas movement Declan Ganley and Niamh Ui Bhriain of the Life Institute.
Pro-life groups from all over the country were represented at the march with an initial gathering stretching across two sides of Parnell Square but that number was expected to grow at the rally in Kildare Street - outside the Dail
There was a large garda presence. A small pro-choice counter demonstration was taking place at the spire on O'Connell Street.
Earlier Archbishop Diarmuid Martin said in a homily at Mass in Church of St. Dominick, Dublin that the Christian message is a message which respects life and respects every human life, from the moment of conception to the moment of natural death and at every moment in-between.
"It respects the life of the unborn; it cherishes and wishes to protect the lives of mothers and mothers to be,' the Archbishop said.