Timeline of Kathleen Folbigg's case

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A TIMELINE OF MAJOR EVENTS IN KATHLEEN FOLBIGG'S LIFE:

* JUNE 14, 1967 - Kathleen Megan Donovan (later Folbigg) born

* JANUARY 8, 1969 - Folbigg's mother murdered by her father

* 1987 - Kathleen marries Craig Folbigg

* FEBRUARY 20, 1989 - Caleb Folbigg dies aged 19 days

* FEBRUARY 13, 1991 - Patrick Folbigg dies aged eight months

* AUGUST 30, 1993 - Sarah Folbigg dies aged 10 months

* MARCH 1, 1999 - Laura Folbigg dies, aged 18 months

* OCTOBER 24, 2003 - Folbigg sentenced to 40 years in prison for murder, non-parole period is 30 years. Later reduced on appeal to 30 years with a minimum of 25 years

* SEPTEMBER 2, 2005 - High Court refuses to grant special leave to appeal

* JUNE 10, 2015 - NSW governor David Hurley receives petition for review of convictions based on forensic pathology findings

* OCTOBER 28, 2018 - Former judge Reginald Blanch begins hearing inquiry into convictions

* MAY 2019 - An international medical registry reports that two US children have died of the mutation found in Sarah and Laura

* JULY 2019 - Blanch inquiry finds no reasonable doubt to Folbigg's convictions - v Validation of Folbigg mutation could not be completed before end of inquiry

* OCTOBER 2019 - Folbigg's lawyers apply for judicial review of the Blanch inquiry

* NOVEMBER 2020 - Likely role of CALM2 mutation in Sarah and Laura's death confirmed in world-leading study

* MARCH 3, 2021 - Scientists' petition for Folbigg pardon sent to NSW Governor Margaret Beazley

* MARCH 24, 2021 - NSW Court of Appeal dismisses challenge to Blanch inquiry, stating the conclusion was not at odds with the scientific evidence