A father who murdered his baby just weeks after adopting her may have slipped under the radar as he was seen as a "positive parent", a review has found.
Elsie Scully-Hicks died in May 2016 when she was 18 months old.
She was subjected to a catalogue of injuries by killer Matthew Scully-Hicks in the eight months he had care of her.
A child practice review said these were never considered anything other than "childhood accidents".
Cardiff and Vale's Regional Safeguarding Children Board agreed that while Elsie's death could not have been predicted it could potentially have been prevented.
Elsie's catastrophic injuries included a fractured skull, bruises and a broken leg at the hands of her adopted father at their Cardiff home.
But a report said professionals failed to "see a pattern emerging with injuries", and the failure to spot a second fracture in her leg on an x-ray in 2015 meant she was not flagged up as a safeguarding concern.
Personal trainer Scully-Hicks, originally of Delabole, Cornwall, had denied murdering the 18-month-old but was found guilty at Cardiff Crown Court after trial last year.
He must serve at least 18 years behind bars before being considered for release.
The review, published by the Regional Safeguarding Children's Board on Thursday, said there were missed opportunities "to raise safeguarding concerns and instigate child protection procedures" and no evidence was seen of injuries being considered as a pattern.
This is despite Elise needing medical treatment on numerous occasions while in Scully-Hick's care, including:
- In November 2015 she went to the GP as she could not bear weight on her leg - an x-ray later found she had a fracture
- In December 2015 she suffered a large bruise on her forehead
- In March 2016 she was described as vomiting after falling through stair gates
Despite the list of injures, Scully-Hick's explanations were accepted by health professionals, and if both fractures had been spotted on the x-ray in 2015 it would have highlighted a potential issue, as getting two fractures from a minor fall would have been highly unusual.
Scully-Hicks and his husband Craig went through a year-long assessment before being formally allowed to adopted Elsie.
The couple decided Scully-Hicks would stay at home while Craig continued to work as a company director with frequent trips away overnight.
Who was Elsie Scully-Hicks?
Elsie was named Shayla O'Brien by her birth family when she was born in November 2014.
She was put up for adoption in May 2015, and adopted by personal trainer Scully-Hicks and his husband Craig.
But her birth family said they always hoped she would be reunited with them.
However they were visited by social services in January 2017 and were told Elsie had died in May the previous year.
During his trial, Scully-Hicks claimed he never harmed Elsie and said she must have suffered her fatal injuries after he changed her for bed at home on 25 May 2016.
She died at Cardiff's University Hospital of Wales four days later after doctors determined she could not be saved and her ventilator was switched off.
A pathologist said her injuries were "very typical" of a shaken baby.
A CT scan showed she had bleeding on the brain and a post-mortem examination revealed she had also suffered broken ribs, a fractured left femur and a fractured skull.
There was also haemorrhaging within both of Elsie's retinas - associated with inflicted trauma or injury.
Dr Sarah Harrison, who examined Elsie after her death. said her leg injuries looked like those sustained in major trauma incidents such as a car accident.