A Mitcham woman accused with her partner of murdering their four-week-old daughter searched "shaken baby syndrome" days prior to the baby's death, a court was told.

Former Mitcham residents Clare Sanders, 43, and Tomas Vaitkevicius, 45, are accused of killing their daughter Eva Sanders in September 2017.

Prosecutors say they killed the baby by repeatedly shaking her.

It was reported on Wednesday (February 26) that jurors assigned to the case heard how Sanders made internet searches on her phone for "shaken baby syndrome NHS", "shaking babies" and "baby is shaking".

The searches were made on August 27, less than a week before Eva was taken to St George's Hospital in Tooting, the court was told.

Eva was pronounced dead on the evening of September 2.

Tom Little QC, prosecuting, told the Old Bailey: "Eva, the prosecution say, was violently shaken on at least three separate occasions in the early weeks of her life.

"This was, we say, a brutal series of assaults. A defenceless baby was not able to talk, not able to say what happened, not able to defend herself," Little said.

Vaitkevicius and Sanders, of Streatham Road in Mitcham, deny murder and causing or allowing the death of a child.

In interview with the police, Sanders said Eva's arms and legs had been shaking on August 28, but she could not provide an explanation for the shaking or the injuries the baby had suffered.

Prosecutor Little said while parenthood can be hard, that was never a recourse to violence:

"It can be difficult for the mother and it can be difficult for the father.

"But what you do not do when they cry or will not feed properly is to assault them.

"What you do not do is shake them violently. What you do not do is break their ribs.

"If you do assault them and shake them violently and break their ribs, what do you intend?

"If you do cause those injuries, you must have intended to cause really serious harm to your baby.

"A baby caused such injuries and pain may well keep on crying and will not stop crying."

The trial continues.