I am apoplectic at the colonisation as the next woman, and as someone whose life was blighted by endometriosis and adenomyosis, I will shout till I'm blue in the face that these are afflictions that affect WOMEN...but
...there are cases in the medical literature of males having endo. Not transwomen, but rarely, it has been noted in passing (I believe at the point of autopsy) that masses with the characteristics of endo have been found in males.
What that does is not support the idea of menses in males, but in the metaplasic theory of endo, which is that some cells may change from one type of cell to another - eg, cells that would ordinarily function as part of the uterine lining can stray elsewhere in the body - and that is what causes endo.
And so ends the endo-geek sidebar! (when you are too sick to move because of it, you have a lot of time on your hands to read PubMed).
None of this has anything to do with trans issues. That is sheer biological colonialism. And they can jog on.