A POST mortem report on baby Zayden Veal shows he suffered a series of blows with a blunt instrument to his face and body, causing his death.
The infant endured multiple injuries to his head and torso, including a fractured skull and broken ribs.
Dr Jacqueline Lee, who prepared the post mortem, told the Bendigo Magistrates Court Zayden suffered at least 25 impacts to his face.
Dr Lee testified on Thursday that the injuries occurred moments before the 11-month-old's death.
"Once the injuries were sustained the child would have been dead very shortly thereafter," she told the court via videolink.
The post mortem report also revealed Zayden had pre-existing injuries to his ribs.
Dr Lee said she was unable to determine when the baby suffered the initial fractures, but said the broken ribs sustained on the morning of June 15 were new injuries on top of old injuries.
Zayden's mother Casey Veal told police in a statement she had taken Zayden to see a doctor on June 13 in relation to a cold and conjunctivitis.
There was no reference to any injuries to Zayden’s ribs.
Dr Lee said the injuries on June 15 to the baby's nose, forehead, and cheeks were consistent with a strike from a blunt instrument.
"They appear to be individual injuries," she said.
"I would say a minimum of 25 impacts."
Dr Lee said the degree of force used in the injuries ranged from moderate to severe.
She said some of the lacerations and bruising could have been caused by either an instrument or the force of a hand.
The court heard the exact time of death was unknown.
Dr Lee said Zayden may have been already dead when he was discovered by his mother but she was unable to say for sure.
Ms Veal said in her police statement she found her son covered in bruises in a pool of blood.
"I pulled the blanket back and saw all the blood and started screaming," she said.
"His little face was covered in bruises and there was a big pile of blood under him."
Harley Hicks of Long Gully has been charged with Zayden's murder.
His committal hearing continues.