was three-months-old, the High Court in Edinburgh was told. Sick Young also raped a girl, starting when she was aged just six-months-old until she was five-years-old.
Those crimes took place between November 2008 and December 2013 at various locations in Edinburgh.
His third victim was a girl aged nine-years-old, abused in July 2013, and again in Edinburgh.
|Baby rapist Stuart Young outside Edinburgh during trial|
Young was arrested and charged in January, 2014 after one of the girls revealed what had happened to her. The children cannot be named for legal reasons.
He was convicted yesterday after a week long trial, taking just two hours to find him guilty of two counts of rape and another of sexual assault.
Paul Arthurson QC adjourned sentence until May 28 but told Young to expect a lengthy prison sentence.