Why did the actress who played Heather Williams leave the show Th Young and the Restless

TV show
The Young and the Restless
Who was the actress who played Heather Williams
Why did she leave the show

I don't know for sure, but it seemed as though that the actress who plays Heather Williams was pregnant. She was always carrying a coat in front of her body and it seemed to be a way of covering her pregnancy. I'm happy to see her return and the plumpness in her face is gone, so I'm sure she's given birth. Hope mom & baby are doing well! I'd like to know if was a boy or girl.