Validation of the 'upsilon' zone (Υ) as a pathognomonic ultrasound landmark for chorionicity and amnionicity in triplet pregnancies at any gestational age.
Vasilica StratulatN MelamedJ BarrettO NevoK HackStefania RonzoniPublished in: Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology (2020)
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