A coroner says lessons must be learned after a mother killed her son whilst suffering serious mental health problems.
Melanie Ruddell from County Durham strangled 2 year old Christy. Her family and friends say their concern had fallen on deaf ears.
The inquest into the death of a 2 year old, who was killed by his mother, has heard from a doctor and a nurse.
Family give evidence into death of toddler
Inquest hears of fears for mother who killed her son