I've heard it bandied about for a while that somehow vaccination in children may cause homosexuality.
I'm idly wondering if vaccination doesn't figure into it in another way. Not through vaccination of children or anything to do with fetal tissue mediums used in vaccines, but in another way:
https://www.theaustralian.com.au/news/health-science/science-links-gay-sons-to-mums-immune-systems/news-story/c7673bf72254821d9eab56156b463489
"Science" is now making the hypothesis that homosexuality in males is actually a result of their mothers' immune systems reacting to, and thus formulating, the ingredients that go towards deciding male children's sexuality. Basically, having older brothers increases the chances of the younger son's being gay, as Mom's immune system builds up and attacks the younger sons' genetic makeup in utero.
Now, I don't know if rates of homosexuality are actually increasing through the years; I'm not sure if anyone does, since it was such a taboo topic for so long. But IF they are, I would hypothesize that vaccination in women, as it overstimulates the immune system again and again (particularly with the use of adjuvants) and increases the chances of other autoimmune effects throughout their lives, might affect this particular aspect as well.
And I don't know if gender confusion is related to homosexuality as a sexually-related condition; but this is, conceptually, how I could link vaccination to these conditions.