Dion and her husband and manager Rene Angelil have one son, 9-year-old Rene Charles.
She had undergone several rounds of in-vitro fertilization in an attempt to get pregnant again.
The pregnancy was first reported by People Magazine.
Dion is working on new albums in English and French, and returns next year to Las Vegas for a three-year residency at the Colosseum at Caesars Palace.
