In the 9-banded armadillos, this process is obligatory and usually gives rise to genetically identical quadruplets.

An exception is the Nine-banded armadillo, which normally gives birth to identical quadruplets.

Very rarely, a second round of splitting occurs, leading to identical quadruplets.

The nine-banded armadillo gives birth to genetically identical quadruplets.

One famous example of a multiple birth study includes the Genain quadruplets, who were identical quadruplets all diagnosed with schizophrenia.

A Sacramento woman gave birth of identical quadruplets, each weighing less than three pounds, a month and half early.

One famous set of identical quadruplets was the Genain quadruplets, all of whom developed schizophrenia.

The nine-banded armadillo has an unusual reproductive system, in which genetically identical quadruplets are born in each litter.

The nine-banded armadillo, Dasypus novemcinctus, gives birth to identical quadruplets.

The remaining identical quadruplets, the scientists say, are alive and well.