B超用于产科诊断已有20多年的历史,但它对孕早期胎儿的发育究竟有无影响,一直是人们关心的问题。北京天坛医院妇产科主任医师张景华、电镜室助理研究员李桂林等研究证实,B超时检查对孕早期绒毛超微结构、细胞膜有直接损害,在胚胎发育过程中,可使流产率及畸形率升高,这一研究对临床优生 B-for obstetric diagnosis has been more than 20 years of history, but it has no effect on fetal development in early pregnancy, has always been a concern. Beijing Tiantan Hospital Obstetrics and Gynecology Chief Physician Zhang Jinghua, electron microscope assistant researcher Li Guilin and other studies confirmed that B-ultrasound examination of the early pregnancy villus ultrastructure, the cell membrane has a direct impact on the process of embryonic development, abortion rates and deformity can be increased This study of clinical eugenics