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Shannon Miller…
Night TerrorsTwins that are not genetically identical, are called dizygotic twins. When women ovulate two different eggs and they are fertilized at the same time by two different sperm the result is fraternal twins. These infants have a different genetic make-up although they share the uterus during gestation. In vitro fertilization often results in fraternal twins (or higher order multiples such as triplets or quadruplets).
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