Murder charge for woman after baby dies in hospital

·1-min read
Dan Himbrechts/AAP PHOTOS

Police are still working on their case against a woman accused of murdering her 10-month-old son.

She was not required to appear in court on Thursday and remains in custody but cannot be named to avoid identifying her child, who is allegedly a victim of crime.

Police allege she tried to drown the boy at a home in Sydney's northwest before allegedly restricting his breathing at a different home two days later.

He was found unresponsive on March 21 and taken to The Children's Hospital at Westmead in a critical condition.

He died two days later, the same day his mother was mentioned in court on two counts of attempted murder.

Charges have been upgraded to include murder after the 10-month-old's death.

Subpoenaed material containing clinical notes from multiple hospitals and medical centres have been returned to the court, while other subpoenas, including some to internationally based organisations, did not produce any material.

"Police might want to communicate with whoever it is about their obligations," Magistrate Michael Barko advised in the Downing Centre Local Court on Thursday.

The matter has been adjourned to June 15 while police prepare a brief of evidence against the woman.