AIM: To determinate the percentage change on natural killer(NK) subsets of peripheral blood and decidua in between normal early pregnancy and spontaneous abortion.

• 目的和方法:采用流式细胞仪检测淋巴细胞亚群法探讨自然流产与正常早孕之间外周血和蜕膜自然杀伤细胞亚群的差异。