This document provides information to help couples choose the gender of their baby before conception. It discusses the biological factors that determine gender and some methods people use to influence whether they have a boy or girl. The document will review the science behind gender selection and provide couples with dietary and lifestyle recommendations they can follow in an effort to conceive a baby of the desired sex. It aims to analyze different gender selection methods and place them on a spectrum from myth to science-based. The overall goal is to educate readers on this controversial topic and help them make informed decisions about preparing for pregnancy.