With my last two pregnancies I was healthy and the baby was growing on track so I did not have any ultrasounds. I chose not to subject my child to possible damage from the heat of the ultrasound. I think the reason we are seeing such a huge increase in ADHD, ADD, Austism can be linked to the number of times the baby is filled with ultrasound waves while developing. The ultrasound heats up tissues and this does cause damage. Wait about 30 weeks and you will see your baby. If you are healthy there is no reason at all to have an ultrasound. Ultrasound is very uncomfortable for the baby. Just be patient.
Here is an excerp from an article and the risks of ultrasounds:
"As the FDA warned in 2004, "ultrasound is a form of energy, and even at low levels, laboratory studies have shown it can produce physical effect in tissue, such as jarring vibrations and a rise in temperature."(9) This is consistent with research conducted in 2001 in which an ultrasound transducer aimed directly at a miniature hydrophone placed in a woman's uterus recorded sound "as loud as a subway train coming into the station."(10)
A rise in temperature of fetal tissue—especially since the expectant mother cannot even feel it—might not seem alarming, but temperature increases can cause significant damage to a developing fetus's central nervous system, according to research.(11) Across mammalian species, elevated maternal or fetal body temperatures have been shown to result in birth defects in offspring.(12) An extensive review of literature on maternal hyperthermia in a range of mammals found that "central nervous system (CNS) defects appear to be the most common consequence of hyperthermia in all species, and cell death or delay in proliferation of neuroblasts [embryonic cells that develop into nerve cells] is believed to be one major explanation for these effects."(13)
Why should neurodevelopmental defects in rats or other mammals be of concern to expecting women? Because, as Cornell University researchers proved in 2001, brain development proceeds in the same manner "across many mammalian species, including human infants."(14) The team found "95 neural developmental milestones" that helped them pinpoint the sequence of brain growth events in different species.(15) Therefore, if repeated experiments show that elevated heat caused by ultrasound damages fetal brains in rats and other mammals, one can logically assume that it can harm human brains, too."
Lisa