It's not something you see every day. What's even more amazing is the four babies are actually two sets of identical twins: boys Vincent Ryan and Raymond Zachery, and girls Ruby Abbygail and Alexis Rochelle.
Mother Amanda Davis tells The Early Show co-anchor Rene Syler, the labor "wasn't ever really that bad, but it wasn't fun, either."
Davis, 18, says she fought to carry the babies to term after her original doctor advised her to abort two of the fetuses.
She says, "I'm not the type of person who could pick just two babies and get rid of the other two. And I just wanted them from the time I found out. I wanted all of them."
Her new doctor, H. Frank Andersen, gave her the go-ahead to carry the babies to term but told her she needed to remain bedridden, which she has since June.
Dr. Cody Arnold, the babies' neonatologist at the Baylor University Medical Center, says the babies are doing well. They were born at 29 1/2 weeks' gestation and within three minutes of one another, beginning at 8:56 a.m. Friday. They weighed between 1 pound, 14 ounces and 2 pounds, 9 ounces. The biggest was Vincent, Davis says.
Dr. Arnold says, "They are all breathing on their own. The two boys actually have a little help with a tube in the back of the pharynx to give them a little extra pressure with the air they're breathing. But they're breathing on their own."
The infants were placed in the hospital's neonatal intensive care unit, where they were expected to remain for "about seven weeks or so before they'll go home," Dr. Arnold says.
The odds of having two sets of twins is "one in many million," notes Dr. Arnold.