One week after welcoming a set of "mono mono" twins that were born holding hands, an Ohio hospital has delivered a second pair of the rare babies. 
 
 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." 
 
 Rare Set of Twins Hold Hands in Delivery Room 
 
 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. 
 
 The rare set of twins shared an amniotic sac and placenta. (Image credit: NewsNet5) 
 
 While the girls didn't emerge holding hands, Arnold said they gave their lungs a workout with a healthy cry. 
 
 "I just got a glance, they were so little," Arnold said of seeing her daughters for the first time. 
 
 The girls are being treated at Akron Children's Hospital, where they will remain for several weeks until they grow bigger and stronger. 
 
 Arnold said she expects life will be significantly different when the girls finally get to go home. 
 
 "I'm pretty sure it's going to change a lot after tonight," she told WEWS-TV. "I'm definitely sure of that." 

 CINCINNATI (AP) — An Ohio couple is getting a taste of what it's like to be celebrity parents. 
 
 FILE - In this May 9, 2014 photo, Sarah Thistlethwaite holds her twin daughters, Jenna and Jillian, after her delivery of the monoamniotic twin girls at Akron General Hospital in Akron, Ohio. The identical... (Associated Press) 
 
 The identical twins, born sharing the same amniotic sac and placenta, are making progress toward going home from the hospital, their parents say. A photo showing twins Jenna and Jillian holding hands taken shortly after birth May 9 at Akron General Medical Center went viral. 
 
 "It's still been crazy," father Bill Thistlethwaite said. "Everywhere we go, someone saw it. People are still talking about it." 
 
 He said he and his wife, Sarah, were approached by people Saturday while having breakfast at a diner in their hometown of Orrville before going to visit the girls. They want to know how the twins are doing and express their good wishes, he said. 
 
 Both girls are taking full bottles and have gained weight, each now at 5 pounds or more. 
 
 Their rare birth condition is called monoamniotic, or "mono mono," and doctors say they occur in about one of every 10,000 pregnancies. A second pair born at Akron General the following week also are doing well, hospital spokeswoman Amy Kilgore said. 
 
 Jenna was born first at 4 pounds, 2 ounces and 17 inches, with Jillian following 48 seconds later at 3 pounds, 13 ounces and 17.5 inches. They were born at 33 weeks and two days to their 32-year-old mother, a middle school math teacher. 
 
 They were moved to Akron Children's Hospital after birth because they needed breathing assistance. 
 
 If they continue to hit feeding milestones, they are on track to be home in another week or two, just before Father's Day. 
 
 Thistlethwaite said he's been scrambling to finish painting their bedroom pink. Their 16-month-old son, Jaxon, has visited the girls and kissed them on the cheeks, his father said. 
 
 Thistlethwaite has daydreamed about the time, years in the future, when he and his wife will show the girls their famous baby photo. 
 
 "I already feel like they're going to be best friends," he said. "They'll probably look at it and say, 'That makes sense because that's how we are.'" 
 
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– A rare set of "mono mono" twins—who shared an amniotic sac and placenta—were born just before Mother's Day; now they may be set to leave the hospital in time for Father's Day. Though they needed breathing assistance after their birth at 33 weeks, Jenna and Jillian Thistlethwaite are both gaining weight and taking full bottles, the AP reports. If the twins' health stays on track, they should get to go home (that's Orrville, Ohio) within the next two weeks. Meanwhile, their parents, Sarah and Bill, have achieved celebrity status, getting stopped by well-wishers when they're out, they say. That's thanks in large part to a photo showing Jenna and Jillian born holding hands that's made the rounds online. Their father is looking forward to showing them the picture a few years from now. "I already feel like they're going to be best friends," he said. "They'll probably look at it and say, 'That makes sense because that's how we are.'" A week after the Thistlethwaite twins were born, another pair of "mono mono" twins were born at the same Akron hospital; they're doing well, too, a spokeswoman says. A doctor there tells ABC News the chance of one hospital delivering two such sets is "probably [on] the order of one in a million to one in ten million."