04/24/2012 at 01:00 PM EDT
Giuliana and Bill Rancic are thrilled that they are finally going to become parents
– and they've bonded with the woman who is making their dreams come true.
The couple, who have documented their struggle to have a child
, announced Monday that they're expecting a baby with the help of a gestational carrier.
"She is giving us the greatest gift we're ever getting in our lives," Giuliana, 37, tells PEOPLE of the woman whose identity has not been revealed. "She's so selflessly helping make our dream a reality. We adore her."
Asked if they plan to stay in touch with the woman once their child is born, Bill, 40, says, "That will be up to her, but we are very grateful for what she's done for us and we intend to maintain a relationship with her."
The couple admit they were nervous about picking a surrogate before they met the woman they chose – but they clicked with her immediately.
"Once we met her it was an instinct we had," says Giuliana. "We could tell she was a great person."
And the couple are involved in every step of the pregnancy, including attending regular doctors visits.
"It's important to us to see the development and growth," says Bill. "At the end of the day, it's our baby. Genetically it's ours. It's our embryo. We feel very connected."
For now the parents-to-be are relishing keeping their baby's gender a secret – but they may not be able to keep it for the duration of the pregnancy.
"When you do a reality show and host shows, it's hard to have secrets. Its nice to be able to have something that only the two of us know for now," says Giuliana. "Eventually we may tell."