Sexual differentiation refers to the biological process by which sex organs and traits develop in an embryo. Synonyms for sexual differentiation include sexual development, sexual maturation, and sexual dimorphism. Sexual development refers to the process of acquiring secondary sexual characteristics during puberty, such as the growth of breasts or facial hair. Sexual maturation is a term used to describe the physical changes that occur during puberty that enable individuals to reproduce. Sexual dimorphism refers to the physical differences between male and female individuals, including their reproductive organs and secondary sexual characteristics. Each of these terms highlights a different aspect of sexual differentiation, but all are important in understanding the full scope of human biology.