Ireland's 1937 constitution can be amended only through national referendums. All opinion polls indicate voter approval for Saturday's referendum, in part because of Ireland's scandal-plagued record on child protection.
The government plans to pass a trove of legislation if the amendment passes, chiefly to make it easier for many of the 6,250 children in care homes to be adopted. One bill would explicitly make it a crime to hide information on a suspected child abuser.
Results from the referendum, which asks voters "Yes" or "No," are expected Sunday.