The woman's baby was delivered stillborn at University Hospital Kerry
Gardaí in Co Kerry are investigating an alleged assault on a pregnant woman.
They were notified about the incident in the Listowel area at the weekend.
A woman, who was 32 weeks pregnant, attended University Hospital Kerry in Tralee following the incident.
She was admitted to the hospital with physical injuries.
While at the hospital, her baby was delivered stillborn.
A post mortem examination will be carried out on the body of the infant on Wednesday.
Gardaí arrested a man in his mid-20s over the weekend in connection with the assault.
He was later released without charge, and a file is being prepared for the Director of Public Prosecutions.
Gardaí in Listowel are investigating.