Only twin zygosity DNA testing can positively confirm whether twins are identical or fraternal. Although more than 70% of Dichorionic Diamniotic (Di/Di) twins are fraternal, they can also be identical. A twin zygosity analysis compares the twins’ DNA profiles to see whether they match—an exact match proves they are identical. Twins of any age can be tested. This test if for a Peace of Mind and cannot be used in any legal proceedings.
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