Updated

A central Indiana couple is adjusting to life with their newborn identical triplet girls.

Avery, Cassidy and Bentley Doss were born Monday at St. Vincent Women's Hospital in Indianapolis. The girls are doing well and gaining weight, but will probably stay in the hospital for about eight weeks, parents Amanda and Chad Doss of Franklin told The Indianapolis Star.

They say the triplets were conceived without assistance after Chad had a vasectomy reversed. Amanda learned in June she was pregnant and found out she was carrying triplets from an ultrasound in October.

Experts put the odds of identical triplets being born without fertility drugs at from 1-in-1-million to 1-in-100-million.

Amanda was on bed rest at home throughout November and early December, and was hospitalized for about three weeks before she gave birth.

Avery weighed 3 pounds, 15 ounces; Bentley 4 pounds, 3 ounces; and Cassidy 3 pounds, 11 ounces.

The Dosses said they gave the babies their names based on their location in the womb.

"Seeing them for the first time was a very overwhelming experience, to feel them in my stomach for so long and just wonder what they will look like," Amanda Doss said. "To finally be able to see them was the best day ever."