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。
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。
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