There is no correct answer as they may not have the same start as puberty. Everyone is different so it’s too hard to give a specific answer.
Answer: In one study, exercise stimulated the human brain's ability to maintain old network connections and make new ones that are vital to cognitive health. Other studies have shown that exercise increased the size of a brain structure important to memory and learning, improving spatial memory.
Let's start from the beginning.
Ultrasounds are a type of radiology equipment. Ultrasounds(sonography) can be used to see images inside of the body, including kidneys, uterus and many other internal organs.
Ultrasounds are commonly used for pregnant individuals.another common use is to ee the brain and hips in infants
There can be many complications in a pregnancy. Ultrasounds can determine the sex of the fetus, see if there are amino bands around the limbs( which can cause limbs to fall off, etc. Most ob/gyns want to keep the pregnant individual calm and healthy as well of the fetus.
