Last night the party voted not to go into any coalition led by Fine Gael or Fianna Fáil after the general election.
Sinn Féin will debate a number of motions this afternoon on abortion.
The Ard Comhairle puts forward one that calls for legal frameworks to allow for abortion in limited cases of fatal foetal abnormalities.
But another from Cork says abortion in these cases should not be allowed.
Deputy First Minister Martin McGuinness says he's in favour of allowing terminations in cases of fatal foetal abnormalities.
Last night the party voted not to go into coalition which is led by Fianna Fáil or Fine Gael.
The party is of course open to any of the other parties if Sinn Féin is the larger party.
Sinn Féin President Gerry Adams will deliver his keynote address to the Ard Fheis at 8:30 tonight.
