Further tests will be required to establish the cause of death of a stillborn baby girl at University Hospital Kerry in Tralee last Sunday.

The baby was stillborn hours after her mother was admitted to the hospital for treatment following an assault on her, which occurred in the North Kerry area late on Saturday night or in the early hours of Sunday morning.

RTÉ News understands that the results of these tests may not be available for a number of weeks.

It follows the completion of a post-mortem examination on the baby girl's body by the Assistant State Pathologist Dr Margot Bolster.

Dr Bolster was accompanied by a prenatal specialist during the post-mortem examination. 

The woman was 32 weeks' pregnant when the baby girl was stillborn.

Gardaí at Listowel arrested and questioned a man in his 20s in connection with the assault on the woman.

The man has been released without charge and investigating gardaí will prepare a file for the Director of Public Prosecutions.