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Do Ultrasounds Harm the Fetus?

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Are there any health risks for the fetus that may affect health care providers' stance on whether or not routine ultrasounds are needed? Some women have routine ultrasounds throughout pregnancy. There is no exact number of necessary ultrasounds required; it all depends on the specific health care provider and health of the individual pregnancy of each woman. So why do some providers discourage regular ultrasound use?

An ultrasound is a test that allows a picture/image of your unborn baby to appear on a screen for observation. They are oftentimes performed at specific weeks throughout a woman’s pregnancy to monitor the fetus for expected development and possible birth defects or complications. The American Pregnancy Association states that prenatal ultrasounds should only be performed when medically necessary or indicated.

Some providers schedule early ultrasounds to confirm pregnancy, and to make sure the embryo is attached inside the uterus (if the egg implants outside of the uterus it is considered an ectopic pregnancy). Many providers schedule ultrasounds between 16-20 weeks for developmental growth of the fetus; this is also the time when gender may be observed. If a complication occurs or is suspected, additional ultrasounds may be ordered. Because ultrasounds are deemed for medically necessary circumstances, a healthy pregnancy may never require an ultrasound.

What about the risks? Why would somebody prefer not to have ultrasounds performed? A fetal ultrasound works by two actions: heat and vibrations. Dr. Jacques Abramowicz, OBGYN from Rush University Medical Center explained, “There are two major effects of ultrasounds. One is to raise the temperature of the tissue it goes through, and two is to cause vibration because it is a sound wave with positive and negative pressures. The effect that is more important to the fetus is the heating effect.” A study performed in 2002 (see citation below) shows that increasing temperatures might have an affect on the fetus’ central nervous system.

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Nice piece of Info!
Helpful! :)

December 11, 2013 - 2:34am
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