Scientific conditioning methods to give birth to a boy In the process of human reproduction, the birth of a boy or a girl is determined by the genetic factors of the parents. However, some people believe that some scientific methods can help improve the chances of having a boy. Next, we will talk about the conditioning methods for giving birth to a boy from the aspects of diet, living habits, exercise and psychology. Diet plays a small role in affecting the gender of the fetus, but it creates an advantageous environment for giving birth to a boy before and during pregnancy.