“Throughout this book I will refer to both sex and gender. By 'sex', I mean the biological characteristics that determine whether an individual is male or female , XX and XY. By 'gender', I mean the social meanings we impose upon those biological facts. The way women are treated because they are perceived to be female. One is man-made, but both are real and both have significant consequences for women as they navigate this world constructed on male data. But although I talk about both sex and gender throughout, I use 'Gender Data Gap' as an overarching term. Because sex is not the reason women are excluded from data - gender is” ScienceDataSexismInclusionTransChromosomesBiological Sex Book:Invisible Women: Data Bias in a World Designed for Men Source: Invisible Women: Data Bias in a World Designed for Men