Depending on the specifics regarding "intersex", "trans", and other potential overlapping categorizations, estimates range from 1 in 5,500 births (sex chromosom

Depending on the specifics regarding "intersex", "trans", and other potential overlapping categorizations, estimates range from 1 in 5,500 births (sex chromosomes inconsistent) to as common as redheads (1 in just over 50). Roughly 0.5% is a good split-the-baby estimate, meaning a substantial fraction of the population may have issues with genitalia identification at birth, with another 1% having presentation later through late‑onset congenital adrenal hyperplasia (LOCAH), Klinefelter syndrome, and other chromosomal differences.