The B-model ultrasound measured amniotic fluid index ( AFI ) ≤8 was taken as the diagnostic standard for oligohydramnios.

  • 结论应重视对妊娠合并症在37周后及正常妊娠在40周后B超对羊水的动态监测,但因其局限性,需结合临床胎心监护以提高对羊水过少的诊断率.

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