脐带过短

脐带脱垂(prolapse of umbilical cord)

名词解释脐带脱垂(prolapse of umbilical cord)

脐带帆状附着(cord velamentous insertion)

名词解释脐带帆状附着(cord velamentous insertion)

胎盘嵌顿

名词解释胎盘嵌顿