Polls have closed in the referendum on the Eighth Amendment.
The poll suggests Yes has won by 68%
Figures suggested turnout slowed after an initial rush earlier.
An exit poll by the Irish Times has predicted the country has voted "by a landslide margin" to repeal the Eighth Amendment.
The poll suggests the margin of victory for the Yes side will be 68% to 32%.
According to the poll, the highest Yes vote was in Dublin, where 77% of voters backed the proposals.
The majority in favour of repeal in rural Ireland at 60% was smaller than in urban Ireland.
EXIT POLL: Majority vote in favour of repeal in all regions. pic.twitter.com/MVi3l9fmI0— Ipsos MRBI (@IpsosMRBI) May 25, 2018
The poll also found that women voted in favour for the proposal by 70% voting in favour and 30% against.
Support from men was weaker, but still high - at 65% to 35%.
While younger voters were also in favour of the change, with majorities in all age groups under-65.
The exit poll was conducted by Ipsos/MRBI among 4,000 respondents at 160 polling stations in every constituency.
Interviewing began at 7.00am on Friday and continued throughout the day.
The poll is estimated to have a margin of error of +/- 1.5%.