Toledo, Ohio ? An Ohio woman who gave birth to a baby boy after a fertility clinic implanted her with the wrong embryo is a “guardian angel,” the boy’s biological parents said Saturday.

Paul and Shannon Morell of suburban Detroit said in a statement that they would be “eternally grateful” to Carolyn Savage, of Sylvania, for her decision to give birth to their child despite the clinic’s mistake.

“It’s been a long, difficult journey, and we’re thrilled that our family is now complete,” the Morells said. “We will be eternally grateful for his guardian angel, Carolyn Savage, and the support of the entire Savage family.

“We’re looking forward to spending the next few weeks getting to know our new baby.”

The boy was born Thursday at 5 pounds and 3 ounces at St. Vincent Mercy Medical Center in Toledo. He measures 18 inches long.

In a statement Friday, the Savages offered congratulations to the Morells.

“At this time, we would like to offer our heartfelt congratulations to the Morell family on the birth of their son,” the Savages’ statement said. “We wish Paul, Shannon, their twin girls and their new baby boy the best, as they move forward with their lives together.”

The Savages extended thanks to people around the world for their support and prayers. They thanked medical professionals for their care and treatment throughout the pregnancy and delivery.

The Savages say a fertility clinic outside Ohio transferred the wrong frozen embryo in February. Ten days later, they got a call from a doctor at the clinic saying she was pregnant with someone else’s child.

The Savages said in an interview with The Associated Press on Wednesday they never considered terminating the pregnancy or trying to fight for custody.

They have hired attorneys who say they are working to make sure the fertility clinic accepts responsibility.