What makes this story even more interesting is they are not quadruplets but actually two sets of twins.
What are the odds of that occurring? One in 70 million.
The Montalvo family originally planned for one child but got the surprise of their lives.
The Montalvo parents said they just wanted a sibling for their two-year-old son Memphis.
When doctors discovered Tressa Montalvo was carrying two sets of identical twins, Tressa was told to be extremely careful.
"A lot of patients with high order multiples are in the hospital for long periods of time but she stayed compliant with bed rest at home," a maternal fetal medicine specialist at The Woman's Hospital of Texas Dr. Brian Kirshon said. "I think this was quite a feat."
When realizing the odds of the pregnancy were so unusual, they decided to go with some unusual names starting with the alphabet.
"We just started thinking originality still and something different so we're going with Ace, Blaine, Cash and Dylan," Tressa Montalvo said.
The newborns are expected to go home in a couple months.