Q&A: What’s a Chorionicity Scan and Why Would I Need One?

What’s a chorionicity scan and why would I need one?
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ByKaren Moise, RN
Registered Nurse
Updated
Mar 2017
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A chorionicity scan helps determine whether or not your babies are sharing a placenta. If you have a multiple pregnancy, you’ll want to ask for a chorionicity scan to find this out early on so you can determine if your babies are at risk for twin-to-twin transfusion syndrome. Babies who do share a placenta should be monitored extra-carefully for this condition to ensure that you have the healthiest pregnancy possible.

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