Twin - Wikipedia One twin, the 'donor' twin, is small and anemic, the other, the 'recipient' twin, is large and polycythemic The lives of both twins are endangered by this condition
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Twin | Identical, Monozygotic, Dizygotic | Britannica Twin, either of two young who are simultaneously born from one mother Twinning, common in many animals, is of two biological kinds: the one-egg (monozygotic), or identical, type and the two-egg (dizygotic), or fraternal, type
Understanding Twins | Psychology Today There are different types of twins, identical and fraternal being the most common Identical, or monozygotic, twins develop from the same fertilized egg that splits into two These twins are