Utah Woman Gives Birth to 14-pound Baby

At 14 pounds and 22 inches long, Joel Brandon Jr. is believed to be in the largest baby born in the United States this year. His closest competitor, Addyson Gale Cessna of Pennsylvania, weighed 13 pounds 12 ounces when she was born earlier this year.

JJ, as the family is calling him, was born at Timpanogos Regional Hospital in Orem, Utah via a Cesarean section.

"I had to have two deliver him instead of one, because they knew he was going to be big," mom Sara Brandon told ABCNews.com. "They struggled to get him out."

Though they knew the baby was big, they had no idea just how big: A previous ultrasound had indicated that the baby was 11 pounds.

"When he came out and they put him on the scale and it said 14-pounds even, I was very shocked, it say the least," Brandon told KSL.

The baby is already sporting the same size diapers worn by his 2-year-old twin sisters, the family reports.

According to Dr. Robert Barbieri of Brigham and Women's Hospital in Boston, the baby's size is likely tied to the fact that Brandon has type 1 diabetes.

"An interesting effect of insulin, if it's not taken in a sufficient amount, the glucose remains high, and the baby's glucose starts to rise," he told ABCNews.com. "It's like giving the baby fertilizer and it grows very large."

Brandon said that while JJ is currently in the 150th percentile for his age, the child's doctor told her that he will likely slim down as he grows.

But for now, she told KSL, "He's my cuddly, chunky baby."

Born weighing 15 pounds 7 ounces, England's George King currently holds the title of world's heaviest baby born in 2013.