Rape is the "only rational" explanation for an 11-month-old baby's internal bleeding, the prosecution has argued at a retrial for her killer.
Brendon Toohey was in 2017 found guilty of manslaughter over the girl's death, and in 2018 was also convicted of her rape in a judge alone trial, a verdict overturned on appeal last year.
The 42-year-old is now facing another judge-only trial on the charge he raped the girl before her death.
He in April 2014 - only weeks before the girl's first birthday - arrived at Blayney Hospital, near Bathurst, carrying the unconscious child and claiming she had fallen off a trampoline onto concrete.
She died of blunt force trauma atypical of a simple fall and had bleeding in her rectum, leading detectives to accuse Toohey of both homicide and child rape.
In a virtual hearing at Sydney's Downing Centre District Court on Monday, prosecutor Ciro Triscani argued the evidence to be presented at the trial led to only one conclusion.
The doctor conducting the autopsy opined that the pattern and severity of the girl's injuries could not be explained by a simple fall, and also noted bleeding found several centimetres inside the child's rectum.
"He was of the opinion that it could only be explained by penetration ... and that is the inference that the Crown contends," Mr Triscari said.
"(It) is the only rational inference which will arise on the evidence that we'll hear over the next couple of days."
But barrister James Trevallion argued the Crown had insufficient evidence to prove the charge beyond reasonable doubt.
"The accused denies the allegation and otherwise the defence cases that there is insufficient evidence... (the hemorrhaging) is an injury and that the injury was caused by the accused," he said.
"During the course of evidence, Your Honour I expect will hear other possible explanations as to what could have caused what the defence says is not an injury but an abnormality."
The trial before Judge Leonie Flannery resumes on Tuesday.