72 people in Cavan and Monaghan have registered contact preferences since the enactment of new birth information legislation.
In July, the Birth Information and Tracing Act gave legal entitlement to full and unrestricted access of birth certificates and other documents to people who were adopted.
The Contact Preference Register allows an adopted person or relative to indicate if they'd like to share information or have no contact.
Since July, 52 adoptees and 4 relatives in Monaghan have added their preferences to the register, while 14 adoptees and 2 relatives in Cavan have done the same.
Between July and September of this year, 2,174 people across Ireland have joined the register, bringing the total number to 16,634.