Conjoined twins delivered at an Atlanta hospital on Thursday have died, reports the Savannah Morning News.

Robin and Michael Hamby of Alabama announced the deaths of their sons, Asa and Eli, on Friday in a Facebook video. The couple had previously created the Hamby Twins Facebook page to update supporters about the pregnancy and birth.

The Hambys said the twins died Friday afternoon at the Children's Healthcare of Atlanta at Egleston. Irregularities were found by doctors in the boys' heart. On Friday, one side of the heart beat faster than the other. Their conditioned worsened.

"We got to hold them, love on them and sing to them," said the boys' father.

Asa and Eli Hamby were born at 7:32 a.m. on Thursday by C-section, reports the Atlanta Journal-Constitution. The boys were born at 37 weeks. Joined side-by-side, they shared a torso, heart, and one set of arms and one set of legs, but had separate heads and spines, according to their parents.

The twins arrived at the children's hospital after being delivered Thursday at Northside Hospital in Atlanta in an effort to save their lives. Specialists tried to help the newborn twins breathe better. There were complications -- their two brains were attempting to control three lungs and one heart with two aortas.

Robin was taken from Northside to Egleston to be with Asa and Eli before they died.

"God gave us extra time with them that some parents don't have," Robin said in the Facebook video that was recorded from her hospital bed at Northside Hospital where she is recovering.

Michael told the Columbus Ledger-Enquirer that the boys will be cremated. A memorial service will be planned, he added. 

Conjoined twins are very rare and occur once every 200,000 live births, according to the University of Maryland Medical Center. Many conjoined twins births are delivered stillborn.