The smallest patient to survive at Mount Sinai Hospital in Chicago was given the all clear to leave the neonatal intensive care unit on Wednesday after four months in the NICU.

Baby Eirianna weighed just 13 ounces when she was born premature on Oct. 4, 2016. She was expected to arrive in January.

She was admitted to Mount Sinai's NICU after her birth, where she received around-the-clock care for 140 days, WLS-TV reported. She's the smallest patient to survive at the hospital.

But according to Sinai Health System, Eirianna now weighs more than 6 pounds and breathes room air.

"I'm just grateful," Martins told WLS. "It's been a long haul."

Read the original story at WLS-TV.