The trial heard that Blain had said she was struggling with post-natal depression after Thea’s birth.
On the day of Thea’s death, she was visited in the morning by a social worker who said the baby was in her crib, and that the mother had complained of feeling tired.
Blain was due to take Thea to visit her paternal grandmother Laura Wilson in Ayrshire later that day.
But early in the afternoon Blain called Wilson’s mobile phone. The call was answered by her husband Alan, who told the court he had heard a child screaming in the background.
He told the court: “I had never heard anything like it.
“It was piercing and extremely loud. I thought it was an older child doing it, but then I realised it was the baby who was screaming.
“She [Blain] did mumble ‘I do not know what to do’. She did not sound right. I said: ‘Hang up and call an ambulance’.”
Blain also spoke on the phone to Thea’s grandmother, saying she had found the baby with a bump on her head.
Later, when they met at the hospital, Blain told her another child who was in the flat “had done it”.
Blain had also spoken on the phone earlier to a support worker, telling her that another child had taken Thea out of the cot and dropped her.
When the support worker arrived at the flat she dialled 999 after seeing that Thea was cold, not making any sounds and looked an “awful colour”.
Thea died later that day in hospital.