I know that correlation does not mean causality, but we know that ultrasounds are energy that can be disruptive on both small and large scale levels.
Would you be willing to prove this, once and for all, on your own child in the womb? Hook the fetus up for ultrasounds every day for a while, maybe recording it for posterity?
Until that is done, or a study in which ultrasound is used extensively on fetuses, you won’t know if there is correlation or causality.
Enjoy.
That is not the manner in which an appropriate test would be devised in the first place. In the addition you apparently have no understanding of methodolgy