中国计划生育学杂志
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超声监测孕早期胎儿心轴角度与先天性心脏病关系
1.河北省保定市第一中心医院(071000);2.河北省保定市第一医院
Relationship between the fetal heart axis angle monitored by ultrasound during the first trimester of pregnancy and fetal congenital heart disease
1.The First Central Hospital of Baoding, Hebei Province, 071000; 2.The First Hospital of Baoding