www.thetimes.co.uk/article/science-pinpoints-dna-behind-gender-identity-3vmrgrdnv?shareToken=98be4e3ed6f9cfaedc29d8613afd61b7
Study done on 30 people, no peer reviewed publication, no actual data to look at yet, mentioned by one of the scientists at a conference. It's all so terribly vague but I bet Pink news will be all over it.