GRAND RAPIDS, Mich.— A western Michigan hospital says a woman who was considered dead from brain aneurysms was kept on a respirator for a month to allow the birth of twin boys.

The boys were born by cesarean section at 25 weeks on April 5. A spokesman for Helen DeVos Children’s Hospital in Grand Rapids said today that Nicholas and Alexander are in critical condition.

Spokesman Bruce Rossman says their mother, Christine Bolden, was considered brain dead on March 6. But at the request of family, doctors kept the 26-year-old Muskegon woman on a respirator until it was time to remove the boys.

Rossman says the case was reviewed by an ethics committee at the hospital. He says it “wasn’t that difficult.”

Rossman says the babies are on ventilators and getting around-the-clock care.