Wednesday, August 23, 2006
The Dangers of Ultrasound
Ultrasound Can Affect Fetal Brain DevelopmentA new study out of the Yale University School of Medicine indicates that exposure to ultrasound waves during routine ultrasound scanning can affect fetal brain development.
Lead researcher Pasko Rakic encourages pregnant women to avoid unnecessary ultrasound scans until more research is done.
According to Rakic, although the specific effects of ultrasound waves on human brain development are not fully understood, the following health conditions are thought to be caused by misplacement of brain cells during embryonic development:
- Mental retardation
- Developmental dyslexia
- Childhood epilepsy
- Autism spectrum disorders
Clearly, there are numerous differences between fetal development in humans and mice, differences that make the risk of detrimental effects caused by ultrasound scanning less likely in humans.
Still, in understanding the physiological effects that ultrasound waves are intended to have on live tissue, it seems prudent to avoid them whenever possible.
To learn more about the potential health risks of ultrasound scanning during pregnancy, view the following article:
Is Ultrasound Scanning During Pregnancy Worth the Risks?.
For the Health of Your Baby, Stay Away From Unnecessary Ultrasounds
A study has shown that the frequent use of ultrasound causes brain abnormalities in the developing fetuses of mice.
A small but significant number of neurons in the embryonic mouse brain do not migrate to the correct positions in the cerebral cortex if ultrasound is used often and for prolonged periods.
Neurons must move to a position that determines their connectivity and function after they form. Improper migration can lead to abnormal cortical function.
More than 300 fetal mice were injected with special markers to track their neural development.
Ultrasound exposure caused a number of neurons to remain scattered in inappropriate cortical layers. The dispersion of the neurons increased as the duration of exposure to ultrasound waves increased.Further research will be done on primates in order to help determine whether or not this will also be a problem for human fetuses.
USA Today August 7, 2006
ABC News August 8, 2006
EurekAlert August 7, 2006
Dr. Mercola's Comment: