Medical data suggests there is about a 3:1 to 2:1 ratio. In trans spaces, this gets further amplified by the network effect: a member of a minority is more likely to stumble upon another such person if the group is larger, and the number of possible connections grows quadratically, so people pointing out bias in other comments are not entirely wrong. Similarly, medical data is probably also skewed because it’s obviously self-reported and people are more likely to come out if they feel they’ll get support and to “find out” if their kind of gender questioning process is more frequently discussed. However, these biases don’t explain all the disparity. Research is ongoing but preliminary results ssuggest that of the recessive genes that correlate with people reporting medically as trans, more exist on the X chromosome and since the vast majority of AMAB people have XY chromosomes, they only have one X copy and recessive genes (incl. “trans” ones) are more likely to manifest.