N the state of pregnancy 妊娠
Causes of ectopic fetation in 399 patients were retrospectively categorized and analyzed.
399例患者异位妊娠的原因被回顾性分类并分析了。
Methods Causes of ectopic fetation in 399 patients were retrospectively categorized and analyzed.
方法：采取回顾性分析的方法，对399例异位妊娠的病因进行分类。
In order to probe into effects of zoology environment and weather on fetation of Hynobius Leechii Boulenger, we have observed fetation of Hynobius Leechii Boulenger in Xiuyan and Qianshan area.
为探讨地域生态环境和气候等因素对胚胎发育的影响，对千山区和岫岩区东北小鲵胚胎发育进行了观察。
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