From WENN.com

The Playboy boss' former partner sought medical treatment after falling ill in her final trimester, and Hefner has sent his well wishes to the star.

In a post on his Twitter.com page, he writes, ""I hope Holly Madison is feeling better after being hospitalised for morning sickness in the late stages of her pregnancy. Love, Hef.""

Madison and her party promoter boyfriend Pasquale Rotella are due to become parents early next year (13).