For example, “sex” is typically thought to be a biological “fact,” where bodies are classified into two categories, male and female. Bodies in these categories are assumed to have “sex”-distinct chromosomes, reproductive systems, hormones, and sex characteristics. However, “sex” has been defined in many different ways, depending on the context within which it is defined. For example, feminist law professor Julie Greenberg (2002) writes that in the late 19th century and early 20th century, “when reproductive function was considered one of a woman’s essential characteristics, the medical community decided that the presence or absence of ovaries was the ultimate criterion of sex” (Greenberg 2002: 113). Thus, sexual difference was produced through the heteronormative assumption that women are defined by their ability to have children. Instead of assigning sex based on the presence or absence of ovaries, medical practitioners in the contemporary US typically assign sex based on the appearance of genitalia.

Differential definitions of sex point to two other primary aspects of the social construction of reality. First, it makes apparent how even the things commonly thought to be “natural” or “essential” in the world are socially constructed. Understandings of “nature” change through history and across place according to systems of human knowledge. Second, the social construction of difference occurs within relations of power and privilege.

Introduction to Women, Gender, Sexuality Studies