A pregnant mother has pleaded not guilty to her 17-month-old son's murder, the Old Bailey has heard.
Tracey Connelly, 25, of Penshurst Road, Tottenham, north London, also denies allowing or failing to prevent Peter Connelly's death.
Her partner Steven Barker, 31, denies the same charges. Mr Barker's brother Jason, 35, denies allowing or causing the death of a child under 16.
Peter was declared dead at North Middlesex Hospital on 3 August.
A post-mortem examination carried out at Great Ormond Street Hospital proved inconclusive and further tests were due to be carried out.
Detectives were called to the hospital after concerns were raised by staff, a Metropolitan Police spokesman said.
Ms Connelly, who is due to give birth to another child in March, and Mr Barker appeared in court via video link.
The pair have been remanded in custody until their trial begins on 9 June.
Mr Jason Barker, of Wittersham Road, Bromley, Kent, was granted conditional bail.