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You are here: Home -> Pregnancy Questions and Answers -> What is the difference between identical and fraternal twins? Today: Wednesday, August 23
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Pregnancy Questions and Answers

Question:
What is the difference between identical and fraternal twins?
Answer:
Identical (monozygotic) twins develop from a single egg that divides after being fertilized. Babies are always the same sex, and they look alike. When two eggs are fertilized, the babies will be as different in appearance as any other brothers and sisters. They are called fraternal (dizygotic) twins. Most twins born to older women are fraternal twins—babies born from two different eggs.
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