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头臀长22mm是多少周
更新时间: 2020-11-05 00:00:00  

头臀长约2.2cm,提示早孕八周多,将近九周。实际受孕时间差不多是将近七周。

胎儿,是指妊娠8周以后的胎体。妊娠4~8周娩出的胎体为胚胎。胚胎期重要器官逐渐形成,在胎儿期各器官进一步发育成熟。胎儿在妊娠28周以前娩出的现象称为流产;孕28~37周前娩出的现象称为早产,孕37周至不满42足周娩出的现象称为足月产。妊娠全程共280天即40周。

关键词: 22mm 多少

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