The nurse, she was shocked. She's like "Come here! Come here! Come here!" I went and I'm like, what happened? She's like, well check out this! I checked it, and it was 13 pounds and 13 ounces.'
Mr Garcia explained that all of the couple's other children were all born at normal weights and even the combined weight of their twins at birth was lower than Mia.
He also added that the newborn would be the couple's last child together, even though they had 'tried their best' to have a boy.
Shortly after her birth, baby Mia was flown to a Denver-area hospital after suffering from low glucose levels and having trouble breathing.
But doctors hope she can join her parents and four older sisters Britney, Ximena, Yulissa and Yuliana at home within the next week.
Last year, a mother in Utah also gave birth to a 14lb baby boy, who was dubbed America's biggest baby of 2013.
Joel Brandon Jr., nicknamed J.J., was born by caesarean section at Timpanogos Regional Hospital in Orem, weighing in at 14 pounds and measuring 22 inches long.
His mother, Sara Brandon, said she was stunned by how big J.J. was when she delivered him at 38-and-a-half weeks, as a previous ultrasound predicted he was going to be 11 pounds.
The largest baby ever recorded was born in Canada to mother Anna Bates in 1879, a boy weighing 23lb 12oz, who died 11 hours later.
In 2005 a Brazilian woman gave birth to a 17lb baby boy named Admilton dos Santos.
He was mother Francisca's fifth child and it is thought that his size was caused by gestational diabetes.
- Daily Mail