Doctor Rachel Yang was the doctor who performed an ultrasound on Mercedes Fisher when she fell off a stage in June 2011. Mercedes had pretended that she was pregnant, and was worried that her fake pregnancy would be revealed to fiancé Riley Costello and his father, Carl. As Mercedes confessed, Doctor Yang told her that she had picked up a strong heartbeat - she was pregnant after all!
In December 2018, Doctor Yang informed Mandy Morgan and Darren Osborne that their unborn baby had spina bifida, which she had an operation for in February 2019. Mandy went into premature labour in April 2019, and Doctor Yang delivered their baby boy.