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Kids Health: When You Are a Twin or Triplet
"Have you ever wondered what it feels like to be a twin?" KidsHealth considers the types, troubles, and terrific things about twins and triplets.
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Better Health Channel: Identical and Fraternal Twins
The Better Health Channel of Victoria, Australia, offers information on twins. Factors that increase the odds of having twins, how different types of twins originate, possible birthing complications, and zygosity testing are covered.