A police media liaison spokeswoman said the 28-year-old woman suffered serious injuries during an alleged assault at her Ocean Grove address in Warrnambool overnight on Tuesday last week.

She said a 37-year-old Warrnambool man had been charged with intentionally causing serious injury and recklessly causing serious injury in relation to the incident.

"The investigation remains ongoing," a spokeswoman said.

It's expected part of those investigation will now involve homicide squad detectives considering laying more serious charges.

The woman was found about 10am on Wednesday last week and an unknown person called an ambulance.

The woman was transported to the Warrnambool Base Hospital, assessed and treated before being flown to the Royal Melbourne Hospital in a critical condition with head and spinal injuries.

The woman was placed on life-support and had remained in a critical condition there until life-support was turned off earlier this week.

Victoria Police homicide squad detectives took over the case prior to the woman's death on Wednesday after initially assisting Warrnambool-based police family violence unit investigators.

Warrnambool man Paul McDonough, 37, appeared briefly in Warrnambool Magistrates Court on Thursday last week charged with assault-related offences.

He did not apply for bail and was remanded in custody until March 27 next year for a committal mention hearing.

Early on Wednesday last week police launched a manhunt for Mr McDonough, who was arrested about 5.30pm that afternoon.

Crime scene officers examined the unit on Wednesday and police also talked to neighbours who were able to provide officers with information.

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