Charlotte is brain-damaged and needs an oxygen mask

Darren and Debbie Wyatt, of Portsmouth, plan to present the evidence at a hearing into their daughter Charlotte's future in March.

Last year a judge agreed Charlotte's quality of life was so poor doctors could choose not to resuscitate her.

But the Wyatts say their baby is happy and aware of her surroundings.

She's not in constant pain and there's great proof of that Darren Wyatt

At a hearing on 28 January, Justice Hedley gave the baby's parents permission to bring up-to-date expert evidence to court at a hearing before Easter, which the couple hope will lend weight to their case.

The Wyatts say they have new evidence from six independent medical experts.

Mr Wyatt said: "She's smiling, she's looking around, she knows her whereabouts; she's a pretty happy child.

"She's not in constant pain and there's great proof of that as well."

Doctors treating her say that on the surface she has improved, but her underlying condition has not changed.

Doctors' children

Charlotte, aged 16 months, remains profoundly brain-damaged and she cannot breathe without an oxygen mask.

Doctors say to give her aggressive, invasive treatment like resuscitation is not in her best interest.

The Wyatts disagree and are going back to court next month to try to convince the judge to change his mind.

Mr Wyatt said: "Well, I think the doctors need to be in our shoes really, because if it was one of the doctors' children, if they've got children of their own, would they be saying the same thing?"