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。
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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。
3
Due to eyes characters of anatomical structure and optical function, it plays more important roles in eyes stasis, fetation, differentiation, proliferation and tumor incidence.