Unknown to Western scientists, the hazards of ultrasound have been confirmed in China since the late 1980s, where thousands of women, volunteering for abortion, thousands of maternal-fetal pairs, were exposed to carefully controlled diagnostic ultrasound and the abortive matter then analyzed via laboratory techniques.  I found these studies interesting. I don't doubt that there is some harm caused. However, I see some flaws in the studies. The studies were done on post-abortive tissue not on babies carried to full term. Perhaps many of these abortions were considered due to defects in the fetuses. The resilience of humans to derogatory stimuli is significant. As I said, it is not my goal to defunct the studies. The standard of care with U.S. doctors is to not do ultrasounds until after the first trimester so as to not affect with development of the neural tube. In cases where there are concerns about the health of the baby or the mother, an ultrasound may be done to assure proper development within the mother in the first trimester. Proper development applies to a multitude of possible concerns such as an ectopic pregnancy. Ultrasound is used as a safer alternative than x-ray. Ultrasound i  3e93  s also recognized as a much more economical measure than other alternatives. These studies should drive medical researchers to find an economical safer approach. Thank you for your post.