Last Updated
：2025/11/29
gestational sac
（ plural ）
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(medicine) The intrauterine structure around an embryo in the very early stage of a fetus that can be used to determine if an intrauterine pregnancy exists until the embryo is identified.
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gestational sac
The ultrasound clearly showed a small gestational sac within the uterus, confirming an early intrauterine pregnancy.
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The ultrasound clearly showed a small gestational sac within the uterus, confirming an early intrauterine pregnancy.
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