Abt switch
The Abt switch is a kind of railway switch used on funiculars (inclined cable railways) that doesn't have any moving parts. It allows two cars to pass each other going uphill/downhill while sharing the same tracks. While most train switches rely on physically moving a section of track so the train goes one way or the other, the abt switch doesn't move at all. Instead each carriage has a grooved wheel which makes it turn left or right at a junction by sticking to the track on one side.
spoiler Image sources https://commons.wikimedia.org/wiki/File:Funicular_to_Horseshoe_Curve_viewing_area_(8999490400).jpg#mw-jump-to-license
https://commons.wikimedia.org/wiki/File:Funicular_layouts_(2_rails).svg#mw-jump-to-license
https://commons.wikimedia.org/wiki/File:Heidelberg_funicular_wheelset.jpg#mw-jump-to-license
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The only thing I can really think of is shedding more hair, but I'm suspicious that started about when I started prog and that it might be the backdoor conversion thing
there is no evidence that prog turns into t, dht, etc in adults. infact it has been shown to work as a (extremely mild) antiandrogen though thats mostly anecdotal
plus if it did then wouldnt all the cis girlies with prog also be having a bunch of issues? just doesnt really make sense if u think about it