Some conditions, such as androgen insensitivity syndrome (where a genetic male baby can't process male hormones and grows up female) or Klinefelter syndrome (where males are born with an extra X chromosome), have only a modest impact on quality of life — hell, a few people have parlayed their genetic idiosyncrasies into Olympic gold. One reads of gonads that are combinations of male and female parts, women born without a vagina, even a few folks born with both a penis and a vagina.
One especially unusual type of intersex person is known as a chimera, which results when male and female embryos meld together genetically to form one individual — and if you think you've got identity issues in your garden-variety life, try coming to terms with that.
However you sort it out, this is a pretty exclusive group — something like one person in 5,000 is different enough from the standard model to be considered intersex.
Intersexuality is almost always the result of a genetic disorder.
And, indeed, until puberty, such girls easily pass as normal pre-pubescent females.
Intersex people are born with sex characteristics (including genitals, gonads and chromosome patterns) that do not fit typical binary notions of male or female bodies.Intersex people possess any of several variations in sex characteristics including chromosomes, gonads, sex hormones, or genitals that, according to the UN Office of the High Commissioner for Human Rights, "do not fit the typical definitions for male or female bodies".Intersex people face stigmatization and discrimination from birth or discovery of an intersex trait.Some chromosomal intersex variations may not be physically apparent at all.Some intersex traits are not always visible at birth; some babies may be born with ambiguous genitals, while others may have ambiguous internal organs (testes and ovaries).