Over 20,000 disclosures of domestic abuse against women and children were made to Women's Aid last year.
The charity will publish its impact report today.
It is calling for improved protections for children when granting access visits for the perpetrators of domestic violence.
Last year, over 19,000 contacts were made to the organisation's helpline and one-to-one services, during which 17,000 disclosures of domestic violence against women were made.
The organisation also heard close to 4,000 disclosures of child abuse in the context of domestic violence.
Callers told Women's Aid their children were slapped and called names and, in some instances, sexually abused and threatened that they would be killed alongside their mothers.
The NGO said that custody and access arrangements in Family Law proceedings often disregard the impact of domestic violence and risk continuing abuse of children and their mother during the handover period.
The report will be launched by Minister for Children and Youth Affairs Katherine Zappone.