I have spoken to many parents who have had positive results using this technique.
Children/people are in a continual state of development that begins from when the person is in their mother’s womb until death.
It is best to strive for perfection and goodness.
The technique is this:
When the woman is pregnant with child you should introduce the baby (fetus) with positive vibrations. Popular acceptance is to direct classical music into the womb.
The better technique is to introduce positive human vibrations into the womb. Talk softly to the baby before birth. You can even get romantic about it, by making it a point to talk directly into the womb with conversation from the parents and close friends.
Summary: Talk positively into the womb to the baby. Talk to the baby before birth.
Have fun.