The consistency of monozygotic twin rates means that finding two pairs of identical twins among 64 individuals from any single context is statistically remarkable.

The two pairs of identical twins in the chultún at Chichén Itzá join the very small number of ancient identical twin pairs that have been identified in the archaeological record through genomic analysis.

The methodology for identifying ancient twins from DNA is relatively new, and the Chichén Itzá findings represent an unusually clear case: two pairs, from a single well-defined archaeological context, analyzed in a single study.

The presence of two pairs of identical twins in a subterranean ritual burial at Chichén Itzá cannot be coincidence in any straightforward sense.