How can scientific methods improve the chances of having a boy? As we all know, the sex ratio of boys and girls is equal, but sometimes couples hope to have a boy, so what scientific methods can help increase the chance of giving birth to a boy? This article will elaborate on this in several aspects. In genetic inheritance, male and female gender is mainly determined by two sex chromosomes (X and Y chromosomes). For humans, women have two X chromosomes, while men have one X chromosome and one