The nurse is caring for a client pregnant with twins. Which statement indicates the client needs additional information?
1. "Because both of my twins are boys, I know that they are identical."
2. "If my twins came from one fertilized egg that split, they are identical."
3. "If I have one boy and one girl, I will know they came from 2 eggs."
4. "It is rare for twins to both be within the same amniotic sac."
1
Rationale:
1. Not all same-sex twins are identical or monozygotic, because fraternal, or dizygotic, twins can be the same gender or different genders.
2. When the zygote splits, identical twins share the same genotype result.
3. The only way to have twins of different genders is if they came from two separate fertilized ova. Monozygotic twins are identical, and are the same gender.
4. Monoamnionic-monochorionic twins are very rare, and occur as a result of the zygote splitting seven or more days after fertilization.
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