The star and her husband John Travolta confirmed they were expecting their third child last month (May10) after years of trying to expand their family.
And Preston’s mum, Linda Carlson, is confident her daughter’s healthy lifestyle will reduce the risks of any pregnancy complications.
Carlson tells UsMagazine.com, “She’s not worried about it at all. She’s not concerned. She takes really good care of herself and she’s in good health. She looks so much younger.”
The Travoltas’ baby joy comes over a year after the death of their 16-year-old son Jett, who died in January, 2009 after suffering a seizure.
Preston and Travolta are also parents to daughter Ella, 10.