Methods to compare events defined as newly occurring characters in development has advanced vertebrate developmental research but events are not easily extrapolated into traditional staging systems used in biomedical research.

中文翻译：

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猪胚胎分期：基于标准事件系统的统计集群与基于卡内基的分期系统的比较。

比较被定义为发育中新出现的特征的事件的方法促进了脊椎动物发育研究，但事件不容易外推到生物医学研究中使用的传统分期系统。