2 doctors weighed in:

Heterochromia in one identical twin, not the other. Are they fraternal?

2 doctors weighed in
Dr. Nikolaos Zacharias
Obstetrics & Gynecology - Maternal Fetal Medicine
1 doctor agrees

In brief: Not necessarily.

Identical vs. Fraternal twins are archaic terms that no longer apply to the modern perinatal terminology.
, however are still generally true and understandable to lay people. The color of eyes is not the determining factor in zygocity or chorionicity of twins - check prenatal records and placental pathology!

In brief: Not necessarily.

Identical vs. Fraternal twins are archaic terms that no longer apply to the modern perinatal terminology.
, however are still generally true and understandable to lay people. The color of eyes is not the determining factor in zygocity or chorionicity of twins - check prenatal records and placental pathology!
Dr. Nikolaos Zacharias
Dr. Nikolaos Zacharias
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