方法：获取胎盘床活检标本，切片在光学显微镜下观察滋养细胞浸润情况。
Methods: After obtaining the biopsies of the placental bed, the infiltrating of trophoblast cells were studied with light microscope.
方法：获取胎盘床活检标本，切片在光学显微镜下观察滋养细胞浸润情况。
Methods: After obtaining the biopsies of the placental bed, the infiltrating of trophoblast cells were studied with light microscope.
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