Ashley May

USA Today Network

April brought double the fun for The Advocate Children’s Hospital in Oak Lawn, Ill., according to ABC News.

The hospital delivered 17 sets of twins in the first week of April, much more than the average 10 sets usually delivered in an entire month, Brett Galley said.

Galley, a neonatologist in the neonatal intensive care unit, said the last time the hospital saw so many births was "four to five years" ago when four sets of triples were delivered in a week.

Because of the influx of twin births, the NICU is close to maximum occupancy. Many twins are born prematurely around 35 to 37 weeks. As of April 8, the hospital had about 45 newborns and can hold about 57.

Jean Smith, manager of clinical operations in the neonatal care unit, said to the Chicago Tribune when the hospital staff sees this many twin births, attention to detail is extremely important.

"It puts the staff on higher alert because you have to be extra careful with twins," Smith said. "We check every baby by name, date of birth and medical record. With twins, they have same last name and usually the same date of birth."

Popular names for the newborns? Liam, Conor, Kayla, Estelle, Rose and Olivia, the Tribune reported.

The hospital created a photo album on Facebook titled Twins galore with a few pictures of the newborn twins. Here are a few of those photos.