A study by the University of Queensland has found that suicide is the leading cause of death for maternal women in Australia.

Queensland Centre for Mental Health Research researcher Dr Carla Meurk says their findings show suicidal behaviors increase in post-partum women who have a history of mental illness or substance abuse.

The study found new mothers had high rates of contact with health services before taking their own life.

Dr Meurk says a system-wide response is needed to support not only women, but their families, including mental health and community support.

If you need support, please contact lifeline at 13 11 14.