And does it control for/ compare with mental health issues for eg, given that MH disorders could also be linked to hormone receptors in some way. We don't have all the answers for that yet. The article itself quotes the high rates of depression, suicide etc that are often co-morbid with being transgender, and we know also personality disorder is often co-morbid.
What are the impacts of hormones receptors in MH disorders? Oxytocin is being researched for eg, but the studies involve brain scanning, and needs to look at cause and effect eg low oxytocin in people with BPD, could be result of changes to the brain caused by trauma, but then low levels throughout life could exacerbate symptoms. But we don't know for sure which came first the low levels or the disorder, and the research is still ongoing.
I think many of these studies need to be looking at brains and bodies, not one or the other, and linking more than one speciality together to get a better understanding.
Many transwomen have been very macho men before transitioning, both in attitude and physique so what does that mean? It doesn't look like a lack of testosterone there, unless someone can explain that to me! But then these males might be transvestite rather than dysphoric.
These studies look at such small numbers and as PP said, no women, or transmen. Comparing to only 344 males doesn't seem like enough when there are millions of men on the planet.
I have that thing where my third finger is longer than my first which is said by some to be some testosterone wash or something that is probably bollocks, yet I am very female in sexual attributes eg boobs, shape, waist etc. But I do have a GC brain - but I put that down to having some intelligence and critical reasoning skills.