crown-rump-length

crown-rump-length什么意思,crown-rump-length翻译

基本解释

网络: 顶臀长度；头臀长；冠臀长

例句

• The crown-rump length becomes less accurate after 12 weeks in determining gestational age because the fetus begins to curve.

  孕12周后，因胎儿身体屈曲，以胎儿顶臀径推算孕龄已不够准确。