Julia Navarro is serving as a surrogate for her daughter and son-in-law.
Lorena McKinnon says after struggling with fertility issues, she and her husband tried to find a surrogate.
After several offers fell through, the Provo woman says her mother stepped up and offered to carry the baby.
The couple says by having Navarro as a surrogate they're saving about half the $60,000 typical cost of using a surrogate.
The baby is due in early February.
The Salt Lake Tribune reports Navarro's doctors had said that because of her age, there was a 45 percent chance the implantation would be successful.