Lucy Letby, 32, is alleged to have gone on a year-long killing spree while working at the Countess of Chester Hospital.
She is also accused of the attempted murder of 10 other babies.
On Thursday morning, on the fourth day of her trial, the prosecution concluded its opening statement, in which the case against Letby was laid out.
Nick Johnson KC finished by telling Manchester Crown Court about a series of handwritten notes and Post-Its found during a search of her home.
On one green post it note - which was shown to the court - she had written: "I don't deserve to live. I killed them on purpose because I'm not good enough to care for them."
She also wrote: "I am a horrible evil person" and in capital letters, "I AM EVIL I DID THIS". There was no reaction from Letby as her alleged confession was read out.