https://en.wikipedia.org/wiki/Congenital_adrenal_hyperplasia
That said, it seems everybody is talking about a paper that's not actually published yet, so there seems to be a lot of speculation and uncertainty and buzz generation around...
edit: As of 2018, the state of knowledge apparently could be summarized as:
"Was “he” born a “she”? Did Pulaski suffer from a hormonal condition resulting in female physical characteristics? Or were the remains from that Georgia plantation simply someone else’s? The answers will be revealed this summer in a Smithsonian Channel documentary."
https://today.emich.edu/magazine/article/10654
It seems we're still waiting for the documentary to be aired. And hopefully some paper published.