Mrs Patel is charged with murdering her three children

Doctors tested Mia Patel when she was 12 days old because her two baby brothers had apparently died of cot deaths.

Trupti Patel, 35, is charged with the murder of Amar, aged three months, Jamie, aged 15 days, and Mia, aged 22 days.

Mrs Patel, of Maidenhead, Berkshire, denies suffocating her babies either by squeezing their chests or blocking their noses or mouths between 1997 and 2001.

Anne Thomson, a consultant paediatrician at the John Radcliffe Hospital in Oxford, said the tests on Mia's breathing and heart rate revealed no problems.

"When we looked at the monitoring it was clear that for her age all the recordings we made were entirely within the normal limits for a baby of that age."

Cardiac arrest

Further checks on Mia's heart during the 16-hour, overnight tests showed it was "structurally normal," Ms Thomson said.

Another doctor also told the court about the moment that Mrs Patel's second son, Jamie, died after being rushed into Wexham Park Hospital, Slough.

Josceyln Myles, a senior officer at the time, said that when he was born Jamie had been healthy except for a rash.

The next time he saw him, when the baby was being rushed into the emergency ward on 5 July 2001, he was "a very sick baby".

"It was quite evident that Jamie was very unwell," he said.

"It was clear that he was very sick but I didn't understand why".

Jamie suffered a cardiac arrest at 0215 BST the next day.

The trial continues.