脐带脱垂脐带脱垂(prolapseofcord)当胎膜破裂,脐带脱出于胎先露部下方经宫颈进入阴道内,甚至经阴道显露于外阴部。脐带先露(presentationofumbilicalcord)又称隐性... [阅读全文]
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