OH NOOO IM SO SORRY dont take my word as medical advice def look it up, but from what i understand it SHOULD help. T stops menstruation for most ppl - some sooner than others - and so i would imagine it'll do the same here. how fast it happens will vary - im on low dose and my period stopped like 6 months on, my friend on high dose it still happened after a couple years, just lighter and less painful. again idk the exact mechanisms for endometriosis but i think that should be the case! if i were id check transmasc reddits to see if other ppl can share their exps. best of luck and congrats on the soon T!!!!