If your pregnant don't let them do an ultrasound. Here is the problem.

In 1993 CNN warned against pregnancy ultrasound and had the FDA admit it was aware of its dangers. Remarkably, the FDA raised the maximum allowable ultrasound dose by 8 times (despite data showing the old dose was too high) and all those dangers were forgotten. Ultrasound causes a dose dependent injury to the organs and cells that fetuses are particularly susceptible to (especially early in life when ultrasounds have no medical value).

Those harms include:
•Genetic damage, significant damage to cellular structures (e.g., mitochondria, microtubules and the nucleus). •Initiating programmed cell death.
•In mice and monkeys, significantly impaired learning, memory, activity, and sociability.
•Fetal death.
•Hemorrhages.
•A wide range of congenital malformations.
The Chinese in turn conducted a series of studies showing the low doses of ultrasound created those injuries in the placenta, pituitary gland, eyes, immune system, kidneys, liver, ovaries, testicles (and sperm), and the brain’s neurons and glial cells.

Additionally, in humans, ultrasound has also been linked to miscarriages, premature ovulation, male infertility, fetal growth restrictions, altered neurological function, developmental delays. Conversely, ultrasound has not been proven to improve pregnancy outcomes (rather it just leads to more frequent C-sections, prenatal testing, anxiety for the parents, abortions and neonatal distress)

Rather, all it can do most of the time is (sometimes erroneously) tell parents to abort their baby or subject it to invasive (and harmful tests), all of which creates immense unnecessary anxiety and anguish for the parents.

I complied the 200+ studies proving all of this in the article below.
https://www.midwesterndoctor.com/p/the-forgotten-dangers-of-ultrasound

Source: Midwestern Doctor: midwesterndoctor.com