The Archbishop of Dublin said the comments by Bishop Kevin Doran that same-sex couples were not necessarily parents was unfortunate.
The Catholic Bishops of Ireland are calling for a No vote in the upcoming same sex marriage referendum.
They say they cannot support an amendment to the Constitution which redefines marriage and effectively places the union of two men, or two women, on a par with the marriage between a husband and wife which is open to the procreation of children.
The Bishops also say that they respect the views of people who think differently and they trust their views will also be heard and respected.
Archbishop Diarmuid Martin said Kevin Doran’s comments yesterday were unfortunate;
"I think that was an unfortunate phrase," he said. "I hope people were not offended by it."
"We talk about adoptive parents, we talk about lone parents: there are very, many, many definitions. I think we shoud look on that variety of siutuations, and look at it in a way that is more postive – and we shouldn't use phrases that may offend people."