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Not XX and not XY |
one in 1,666 births |
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Klinefelter (XXY) |
one in 1,000 births |
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Androgen insensitivity syndrome |
one in 13,000 births |
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Partial androgen insensitivity syndrome |
one in 130,000 births |
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Classical congenital adrenal hyperplasia |
one in 13,000 births |
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Late onset adrenal hyperplasia |
one in 66 individuals |
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Vaginal agenesis |
one in 6,000 births |
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Ovotestes |
one in 83,000 births |
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Idiopathic (no discernable medical cause) |
one in 110,000 births |
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Iatrogenic (caused by medical treatment, for instance progestin administered to pregnant mother) |
no estimate |
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5 alpha reductase deficiency |
no estimate |
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Mixed gonadal dysgenesis |
no estimate |
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Complete gonadal dysgenesis |
one in 150,000 births |
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Hypospadias (urethral opening in perineum or along penile shaft) |
one in 2,000 births |
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Hypospadias (urethral opening between corona and tip of glans penis) |
one in 770 births |
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Total number of people whose bodies differ from standard male or female |
one in 100 births |
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Total number of people receiving surgery to “normalize” genital appearance |
one or two in 1,000 births |
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Source: www.isna.org/faq/frequency
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