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Two individuals derived from two FETUSES that were fertilized at or about the same time, developed in the UTERUS simultaneously, and born to the same mother. Twins are either monozygotic (TWINS, MONOZYGOTIC) or dizygotic (TWINS, DIZYGOTIC).

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Tree Number(s): M01.438.873

MeSH Unique ID: D014427

Entry Terms:

  • Twin

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