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Yolk Sac Purpose & Function | What Is a Yolk Sac in Pregnancy? - Video & Lesson Transcript | Study.com
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Yolk sac number does not predict reliably amnionicity in monochorionic twin pregnancies: a case of a monochorionic monoamniotic twin pregnancy with two distinct yolk sacs on early first‐trimester ultrasound - Corbett -
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Yolk sac size & shape as predictors of first trimester pregnancy outcome: A prospective observational study - ScienceDirect
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