A woman and two men are to appear in court in connection with the death of a 17-month-old boy.
Tracey Connolly, 25, and Stephen Barker, 31, from Tottenham, north London, are both charged with murder and allowing or causing the death of a child under 16.
Another man, 35-year-old Jason Barker, is charged with allowing or causing the death of a child under 16.
All three were charged by police on Thursday and will appear in custody at Highgate Magistrates' Court.
The infant was pronounced dead at North Middlesex Hospital, north London, on August 3.
A post-mortem examination carried out at Great Ormond Street Hospital proved inconclusive and further tests are being carried out.
Detectives were called to the hospital after concerns were raised by staff, a Metropolitan Police spokesman said.
