DNA from dead Folbigg babies comes before inquiry

Decades-old DNA from the children of serial killer Kathleen Folbigg including newborn blood spots and frozen organ tissue has been analysed for the inquiry into her convictions.

Counsel assisting, Gail Furness SC, on Monday said a multidisciplinary panel of experts had conducted genomic sequence testing on the samples using technologies that have emerged since Folbigg's NSW trial in 2003.

Folbigg was jailed for at least 25 years after she was found guilty of killing her four babies - Caleb, Patrick, Sarah and Laura - in the decade from 1989.

The 2019 inquiry is focused on medical advances and new research including three or more infant deaths in the one family attributed to unidentified natural causes.

Ms Furness said the expert reports from Sydney and Canberra found "no known pathogenic or likely pathogenic variants in genes that could explain unexpected death" in any of Folbigg's four children.

The inquiry continues.