英语词汇gestational sac怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	gestational sac
释义	gestational sac 简明释义孕囊：胚胎非常早期的胚胎周围的子宫内结构，可以用来确定是否存在子宫内妊娠。网络释义 1 ?孕囊孕囊双语例句 1 The positive predictive values (PPV) of the PCR and virus isolation assessments performed in all 50 pregnancies (51 gestational sacs) were 92% and 93.7%, respectively. 聚合酶链反应和病毒分离培养法对50例孕妇（怀51胎）进行评价的阳性预测值分别为92.0%和93.7%。
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