超声下宫颈异质性指数对自发性早产的预测价值

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杨晓艳汤莹莹张瑜

The predictive value of cervical heterogeneity by ultrasound for spontaneous premature delivery

YANG Xiaoyan, TANG Yingying, ZHANG Yu

中国计划生育学杂志 . 2020, (3): 342 .