The Irish government has proposed that if the eighth amendment is repealed, abortion will be allowed up to 12 weeks and between 12 and 24 weeks in exceptional circumstances.
Ballots will be cast at more than 6,500 stations across 40 constituencies in the Republic of Ireland.
However, another illegal voter, now based in Spain, said she felt very guilty about voting.
The heated, emotional campaign saw limits placed on social media advertisements nationwide, with Facebook and Google banning campaign ads after concerns from experts that some campaign ads were funded by US based anti-abortion groups.
"I think there are a lot of people who are reluctant to speak their minds".
The referendum will decide whether the eighth amendment of the constitution is repealed or stays in place.
More than 3.2million people are registered to vote in the referendum, with over 100,000 new voters registering to vote ahead of the poll. After that, Irish voters passed a constitutional amendment that left the abortion ban intact but recognized a woman's right to travel outside the country for an abortion.
Currently, abortion is only allowed when a woman's life is at risk, but not in cases of rape, incest or fatal foetal abnormality. "I think the fact that we're sending people on planes and boats to other countries to deal with problems that should be dealt with at home, it's important to make that right", he said, referring to women who travel to Britain for abortions.
But Taoiseach Leo Varadkar said they are "taking absolutely nothing for granted". "In Ireland today", the video states, with lines cutting between the celebrities, "if the woman beside you is pregnant, she does not have full rights over her own body".
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It added the Chinese Government told the embassy it is also investigating and taking appropriate measures. It didn't further identify the person with the symptoms or say when they had been detected.
Now some stars are using their voices to try to create political change around the globe, with Courteney Cox, Emma Watson, Chelsea Handler and more supporting a referendum up for vote on Friday in Ireland to legalize abortion.
Nevertheless, given the extent to which he has thrown his weight behind "yes", many observers regard this vote as a referendum partly on the popularity of his still-young tenure as premier.
"It is a vote to say, I don't send you away anymore".
Photographs on Twitter showed campaigners hugging and in tears at the Together4yes umbrella group's headquarters shortly after the first exit poll was published.
Many contend that criminalising abortion does not stop it.
The hundreds of notes showed overwhelming support for repeal - but foreign visitors can't vote, so the display does not offer much guidance on what the actual results will be.
Boxes will be opened at the Punchestown Count Centre on Saturday morning at 9am, and a tally there is expected around lunchtime.
And several Irish bishops issued pastoral letters last month, urging voters to defend the unborn, including Bp. John Buckley of Cork and Ross, Bp. Alan McGuckian of Raphoe and Bp. Denis Nulty of Kildare and Leighlin.
"If we vote "yes", every unborn, wanted and unwanted, will have zero rights", Killarney resident Frances Kelleher wrote.