Washington State Twin Registry
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Why Twins?
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Why is the Twin Registry Special?
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For Twins
Why are twins special?
Zygosity
Identical vs Fraternal Twins
How zygosity is determined
Zygosity determination done by the Twin Registry
The Importance of Zygosity Testing
Zygosity Testing Companies
Common Misconceptions about Zygosity
Joining the Washington State Twin Registry
Frequently Asked Questions about Joining
Why join the Washington State Twin Registry?
How do you know I’m a twin?
Am I eligible to join the Registry?
Completing the Enrollment Survey
What happens next?
Participating in studies
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Frequently Asked Questions about Twins
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Joining the Washington State Twin Registry
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