People with XY chromosomes and androgen insensitivity syndrome, an intersex condition, can develop external sex characteristics typical of females.
Notes on verification
Well-documented medical consensus supported by multiple authoritative sources including NIH GeneReviews, Cleveland Clinic, and peer-reviewed literature. No controversy or dispute in the science. [cascade flags: wikipedia_dropped_other_sources_exist | tier=silver indep_score=0.983 clusters=3 claim_tier=notable]
Sources
- HHS' New Sex-Based Definitions Ignore Science, Experts Say (seed:health_and_medicine)
- https://www.ncbi.nlm.nih.gov/books/NBK1429/ (corroboration)
- https://my.clevelandclinic.org/health/diseases/22199-androgen-insensitivity-syndrome (corroboration)
- https://www.sciencedirect.com/topics/medicine-and-dentistry/complete-androgen-insensitivity-syndrome (corroboration)
- https://www.ncbi.nlm.nih.gov/books/NBK542206/ (corroboration)