Background: Epidural analgesia ( EA ) is an effective and safe method to relieve labor pain.

  • 前言: 俗称[减痛分娩]的[硬脊膜外止痛](Epiduralanalgesia,EA ) 是一种有效且安全的产痛缓减方法.

  • 互联网 2020-10-24 21:15:49

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