A couple in Georgia celebrated a Christmas miracle after the wife gave birth to quadruplets, who were all born seven weeks premature.

On Dec. 15, Mariah and Jose Marquez met their three sons and daughter for the first time. The couple has been trying to have more children for years, but Mariah struggled with fertility issues.

Despite having difficulties conceiving, Mariah gave birth to the couple’s firstborn, a healthy daughter, some five years ago. Doctors describe their daughter as a “miracle.”

The couple would experience another miracle when they became pregnant with four more children, with the help of fertility treatments.

In a post on Facebook, the Savannah-based Memorial Health University Medical Center posted a picture of the Marquez’s with their newborns.

“Sheer happiness! Our hearts are entirely full,” the hospital wrote of the Marquez’s response to the birth of their new babies. The quadruplets, comprised of three boys and one girl named Jameson, Andrew, Joseph and Delilah, were born at Memorial Health last week.

According to CBN News, the quadruplets were delivered by cesarean and following their birth, they were admitted to the hospital’s NICU. A few days later, Delilah underwent surgery but is recovering well.

Mariah thanked the hospital staff who continue to care for their babies and all who prayed for their family.

Mariah wrote: “I never expected such an outpour of love for our (not so) little family.”