Doctors at a Northern California hospital say a couple has given birth to a rare set of naturally conceived identical triplets.
The Sacramento Bee reports that Abby, Brindabella and Laurel Hepner were born on November 22 at Sutter Memorial Hospital to Hannah and Tom Hepner, of Quincy.
The triplets were produced when a single fertilised 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 1.41kg (3lb, 2oz); Brindabella 1.67kg (3lb, 11oz); and Laurel 1.81kg (4lb).