A mother has pleaded guilty to killing her baby daughter in a "sudden explosion of violence" while suffering from post-natal depression.
Five-week-old Amelia Lilly Sultan-Curtis died from a single blow to the head at Hull Royal Infirmary on 8 October last year.
Natasha Sultan, 21, of Welton Grove, Hull, admitted infanticide on the first day of her trial for murder at Hull Crown Court.
She will be sentenced on Tuesday.
Sultan had originally been charged with murder but the Crown Prosecution Service accepted her plea to the lesser charge of infanticide.
Prosecuting, Tim Roberts QC told the court Sultan had changed her story several times, at first denying any knowledge of injury to her child.
He said she had then claimed she dropped Amelia Lilly accidentally and did not realise the extent of the injury, but later admitted causing the fatal fracture to the skull.
Addressing Sultan, who sobbed throughout the proceedings, Judge Jeremy Richardson QC said: "I cannot and will not ignore the fact you killed your baby... in a sudden explosion of violence.
"It is an anxious and difficult case in equal measure.
"The facts are clear - you killed your much-loved and wanted child when the balance of your mind was disturbed."
The court heard psychiatric reports showed she had been suffering from post-natal depression at the time and had sought help from her doctor.