The Irish Nurses' Organisation has threatened industrial action over the non-implementation of new rosters for a shorter working week.
The INO said the new 37.5 hour week, which was due to be implemented in June, is still not in place in the northeast and parts of Cork and Galway.
The union has begun balloting members in Trim, Co Meath and will also ballot members in counties Monaghan and Cavan if progress is not made.
