The Sacramento Bee reports that Abby, Brin and Laurel Hepner were born Nov. 22 at Sutter Memorial Hospital to Hannah and Tom Hepner, of Quincy.
The triplets were produced when a single, fertilized egg split into three.
Dr. William Gilbert, director of Sutter Women's Services, says the odds of producing identical triplets without fertility drugs range from 1-in-1-million to 1-in-100-million.
He said the rarity makes it difficult to more accurately calculate the frequency of such births.
Abby weighed 3 pounds, 2 ounces; Brin 3 pounds, 11 ounces; and Laurel 4 pounds.
The triplets are still in the hospital until they can maintain body temperature and eat properly.
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