A pathologist at the Coombe hospital said today that baby Darragh Byrne died as a result of multi-organ failure due to hypoxia, or a lack of oxygen.
Dr Colette Adida told Dublin Coroner’s Court that it was not possible to determine the exact cause of the hypoxia.
The Dublin maternity hospital has apologised to the family for failings in his care.
Baby Darragh Byrne died on February 19, five days after he was delivered by emergency c-section in the Coombe Hospital.
This morning, consultant neonatal pathologist Colette Adida said the cause of death was multi-organ failure, secondary to hypoxia.
Dr Adida also said that signs of hypoxia in could have been caused days or weeks before the death.
Counsel for the Byrne's said it was not in dispute that baby Darragh had severe hypoxia for almost 100 minutes.
Further evidence is expected to be heard from baby Darragh’s mother, Maree Butler, this afternoon.
The court heard yesterday the family wanted to give evidence on the condition of Darragh's body when it was returned to them.
Eoin Byrne also told the court that he cried his heart out after seeing that his son was navy blue on delivery.