WeChat
Chinese Journal of Family Planning
Study on the influencing factors of two-dimensional ultrasound imaging of fetal heart during the first trimester of pregnancy
LUAN Zedong, ZHANG Xiaoping, SUN Xiaoyan, WANG Xiaoyan, LIU Yaqin, ZOU Yanli, LI Songyang, WANG Haoling, YANG Nan
中国计划生育学杂志 . 2021, (2): 399 .