After half a year of blood transfusions to treat life-threatening anemia, 9-year-old Ricky Martinez was running out of time.

The Murrieta boy needed a bone marrow transplant to save his life. Although his parents had held numerous drives seeking a match for their son, the perfect donor eluded them.

Then another option appeared ---- doctors found Ricky's own blood from his umbilical cord, banked at birth, and stored in a medical facility.

"I had donated it at birth, when I delivered," said Ricky's mother, Cynthia Martinez. "I had no idea that I'd be using it for him nine years later."

The cord blood discovery represents a "godsend" for the family, Martinez said, because Ricky's body began rejecting the transfusions that keep him alive.

Cord blood contains stem cells ---- undifferentiated cells that can spur production of healthy tissue to help treat various diseases. Doctors believe it could jump-start Ricky's bone marrow, allowing his body to resume normal blood production.

But it's not a guarantee.

Ricky's condition, aplastic anemia, is an extremely rare disease, and cord blood transplantation is an experimental procedure for the condition, said David Buchbinder, a hematologist and transplant physician who is treating Ricky at Children's Hospital Orange County, in the city of Orange.

Although the procedure offers few risks of complications, it also pushes the boundaries of medical practice, placing Ricky in a realm of mixed medical opinions and uncertain results, Buchbinder said.

His parents say they're willing to go there to save their son's life.

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MURRIETA: Surprise cord-blood find is 'godsend' for ailing boy