A new opinion poll shows a majority in favour of allowing abortion on grounds of suicide, although support has slipped over the past three months.

The Millward Brown poll for tomorrow's Sunday Independent also shows an increase in support for Sinn Féin.

Carried out over 12 days running up to last Thursday among just under 1,000 voters around the country, the poll measures support for allowing abortion in a range of situations.

53% believe abortion is acceptable where the woman's life is threatened by reason of suicide – 5% lower than in February.

72% say abortion should be allowed in cases of rape, 78% where there is a threat to life other than suicide, 69% where there is a long term threat to health, with just 28% supporting a woman's right to choose to have an abortion for other reasons.

On party support, 32% were undecided who to vote for.

When they are excluded, support for Fine Gael is at 23%, down one point since the last Sunday Independent poll a month ago.

Labour is unchanged at 12%. Fianna Fáil is down one to 26%; Sinn Fein gains three to 19%, while Independents and others are down one to 19%.  

Satisfaction wtih all the party leaders is up.

Taoiseach Enda Kenny is up one to 26%, Tanáiste Eamon GIlmore up three to 19%; Fianna Fáil leader Micheál Martin gains six to 34%, while Sinn Féin leader Gerry Adams is up five to 28%.

Millward Brown also asked if Mr Gilmore should stay as Labour leader -  26% said he should, compared to 39% who think he should step down, and 36% who did not know.

Just 14% of voters said Labour should stay in government and continue with the Programme for Government; 30% said the party should stay, but renegotiate the Programme; 31% said they should leave while 25% said they did not know.