Intersex is an older term for differences of sex development (DSD). DSD means a person does not have physical attributes indicating only a male or female biological sex.

If other sex chromosome disorders, such as XXY and single X chromosomes, are included in the statistic, then an estimated 1.7% of the world population qualifies under the umbrella term DSD.

Differences in sex development (DSD) encompass a range of rare conditions that impact genes, hormones, and reproductive organs, including genitalia. These conditions lead to variations in sex ...