The Taoiseach said today that he cannot pick and choose what portions of the constitution to uphold when it comes to the abortion legislation.
Enda Kenny's also told the Dáil it's not possible to remove the suicide clause from the Bill as some in his party have demanded.
Four TDs have declared they will vote against the legislation - others including junior minister Lucinda Creighton may also do so at later votes if changes are not made.
Mr Kenny says if for one moment the legislation was to liberalise abortion here he wouldn't have put it forward, and insisted he has to do this:
"Some have argued that the Government is not obliged to legislate within the parameters of 43.3 of the Constitution, as interpreted by the Supreme Court in the X Case," he said.
"Let's be very clear on this point - as head of Government and as one who is privileged to be Taoiseach, I am bound to comply with the Constitution of our country.
"I do not have the luxury of being able to pick and choose which constitutional rights I will comply with or not."