I see NoDykeDoesDick has linked to my essay on autogynephilia... and given me the greatest complement as an educator 'informative'... thank you.
A few comments here to correct some misinformation... but first a confirmation. No, transwomen do NOT experience "periods". Even if the pituitary (the part of the brain that indirectly controls them in women) cycled, it wouldn't create any symptoms since it would only effect a male's T levels if they still had their ummm balls... which are already subject to minor fluctuations on a daily, even hourly basis in healthy men based on a complex cognitive feedback mechanism (e.g. T levels increase when thinking about sex... go down when they become fathers and think about parental tasks). After SRS, there would be nothing that could respond to changing pituitary hormones (called "gonadotropins").
Second, it has been well demonstrated in several studies that AGP transwomen's pituitaries do NOT respond to hormones in the same way as women... though... some gay men and "homosexual transsexuals" do:
sillyolme.wordpress.com/2015/12/28/brain-power/
But even that would NOT mean experiencing "periods" since there are no ovaries to respond to the pituitary hormones to complete the feed back loop that causes the cycling... and certainly no uterine lining to respond to the changing ovarian hormones to create the cramps, etc. Further, HRT is held steady, so would NOT cause cyclic symptoms in any case.
Oh... and yes... the medical term for the hormones given to transfolk is "HRT" as they are used to replace the original with cross-sexed ones. Yes, older transfolk continue to receive HRT as we age... though some silly docs think they should be reduced to mimic menopause, as though that were a good thing! (( I'm currently having this disagreement with my Kaiser assigned endocrinologist since I'm in my early 60's... after having been on HRT since I was a teen ! )).
About "hot flashes"... anyone who experiences significant reduction in sex hormones (T, E, or P), male or female, will experience them. Thus, if a transwoman who is post-op is suddenly taken off of HRT or had their customary dose reduced, hot-flashes may occur. I can tell you from personal experience, they are very unpleasant.
Back to AGPs and "periods"... this is wishful thinking on their part. They so badly want "proof" that they are "really" female in some mystical hidden fashion that any discomforts that fit the stereotypes of the menstrual cycle is misinterpreted as being such.
After reading this thread and thinking about it today... I'm actually wondering if my doc wasn't "educated" by some silly older AGP into thinking that experiencing menopausal symptoms is a "good thing"... cause an AGP just might perversely like the idea, just as they like the idea of having menstrual cramps!!!