Last Updated：2025/11/30
During the twin pregnancy, ultrasound revealed a fetus papyraceus compressed against the placenta — a flattened, parchment-like remnant of a vanished twin.
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During the twin pregnancy, ultrasound revealed a fetus papyraceus compressed against the placenta — a flattened, parchment-like remnant of a vanished twin.
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双胎妊娠では、超音波検査で胎盤に圧迫されて紙状に扁平化した消失した双胎の残骸（紙状胎児）が確認された。
