Isabella Lamont was aged just 20 months old when she died in hospital on October 7, 2018.

Coroner Leveasque Peterson received an update on the case in Wodonga on Tuesday, with the late baby's loved ones watching on.

Her photo was placed in the Wodonga courtroom.

The cause of her death remains unclear.

An autopsy showed brain swelling and cardiac arrest, possibly caused by accidental or non-accidental head trauma, or disease.

Baby Isabella was born to parents Michael Kell and Patricia Lamont by emergency cesarean on January 12, 2017.

She was living with her father and his partner, Leesa Pullen, from February 2018 so her mother could look after her mental health.

They lived on Mann Street and the toddler would attend Cool Frogs childcare on Daintree Way and see a local general practitioner for medical needs.

Counsel assisting the coroner, Libby Murphy, said baby Isabella was dropped off at the childcare centre on October 4, 2018, and looked pale when collected.

She was coughing, less active, and continued to cough after being put to bed.

She was found that night with a large amount of vomit on her hands, clothes and bed and kept putting her hands down her throat, but didn't have a temperature.

Mr Kell and Ms Pullen said they kept checking on her through the night.

Isabella was moaning the following morning and was lethargic that day, and continued to put her hands down her throat.

She constantly asked for water, which she was given.

The family went to the Blazing Stump for a birthday celebration that day.

The toddler was found lying on the ground of the playground twice and was brought inside by other children.

The 20-month-old became less responsive at her Mann Street home later that day and an ambulance was called at 5.32pm amid concerns she was having a fit with gaps between breaths.

She was taken to Albury hospital then flown to the Royal Children's Hospital in Melbourne, where she died.

Dr Melanie Archer conducted an autopsy, and concluded the cause of death was "unascertained".

"The question of how the deceased came to have a cardiac arrest with brain swelling is unsettled," she said in a medical examiner's report.

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"Remaining potential explanations include externally delivered head trauma (including non-accidental and accidental injury) and natural disease.

"However since the findings do not allow these to be differentiated, it is not possible on the clinic-pathological grounds to favour one over the other."

Ms Peterson said the death of any child was a tragic event which would forever impact those involved.

"I investigate what happened and will make findings," she explained those in attendance of the coronial process.

The coroner said she couldn't legally find if someone was at fault or if there was negligence, but could establish facts, findings and make recommendations.

The pandemic and other factors have delayed the case, which Ms Peterson noted involved an extensive investigation with a coronial investigator appointed.

"These are trying times," the coroner said of delays to the case.

"Everybody is doing their best in relation to this matter."

Police are still compiling evidence and investigating.

A brief of evidence must be served by August 11 and it's unclear if an inquest will be held.

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