The fitness guru recently welcomed a 2-year-old adopted daughter from Haiti, while her long-time partner also gave birth to their baby boy, reports Us Weekly.
A source told the publication: "It was one of those things when you put in for adoption, but she has also always wanted a baby of her own but couldn't because of health issues."
Last year, Michaels talked about how close she was to bringing home her adopted daughter.
"I went over to visit orphanages and I ended up falling in love with this little girl, and by the grace of God, I got matched up with her," she expressed.
After gaining fame from her time on The Biggest Loser, Michaels left the show to start a family and put more time into her philanthropy efforts.
Watch Jillian Michaels's fitness workout for Self below: