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How did you determine which twins were fraternal and which were identical? ​

User Artjomka
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When twins are born, the physician is usually able to identify whether twins are identical or fraternal by examining the placenta; identical twins generally share a placenta, while fraternal twins are usually in two separate placentas. ... The test consists of a painless buccal (cheek) swab collected from each twin.
User Mugx
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