Amanda Arnold, 24, gave birth to identical twin daughters Thursday at Akron General Hospital in Akron, Ohio. The girls were monoamniotic or "mono mono," which means they shared an amniotic sac and placenta in the womb. Experts say the rare condition affects roughly one in 10,000 pregnancies.
"If they can hold hands too, that would be great." Arnold told ABC News affiliate WEWS-TV before the birth, referring to the viral photo of monoamniotic twin girls born one week earlier at the same hospital. "I'm ready to meet them."
Dr. John Stewart, director of maternal and fetal medicine at Akron General Hospital, said the chance of two sets of monoamniotic twins being born at the same hospital is "probably in the order of one in a million to one in ten million."
It took doctors only 19 minutes to deliver the twins via cesarean section. (NewsNet5)
Stewart added that the rare twins are usually scheduled for delivery between 32 to 34 weeks to avoid complications like becoming entangled in each other's' umbilical cords.
"The babies can cut of their blood supply to each other," Stewart told ABC News.
Arnold was hospitalized for five weeks before the delivery so that doctors could monitor the twins' blood supply. She gave birth by C-section at 32 weeks.