本文报道29例11～42~(+2)孕周子宫胎盘床螺旋动脉及滋养层细胞浸润的变化。3例为孕早期,26例为孕中、晚期。29例蜕膜段螺旋动脉均有生理性改变,中晚期者则在脱膜-肌段螺旋动脉亦有生理性改变。子宫肌层多核滋养层巨细胞浸润的密度、深度与孕龄似有一定关系,36孕周后肌层内滋养层巨细胞有减少趋势,但不影响螺旋动脉的生理性变化。 This article reports 29 cases of 11 ~ 42 ~ (+2) gestational week placenta bed helical artery and trophoblast cell infiltration changes. 3 cases of early pregnancy, 26 cases of pregnancy, late. 29 cases of decidual segments of the spiral arteries have physiological changes, those in the middle and late in the stripping - myogenic spiral arteries also have physiological changes. Myometrial multi-nuclear trophoblast giant cell infiltration density, depth and gestational age seems to have a certain relationship, 36 weeks after the trophoblastic myometrial giant cells have decreased, but does not affect the physiological changes of the spiral arteries.