I guess I'll take this opportunity to talk about trans women periods.
The first thing any tme person thinks when they hear this is always "how can trans women have periods? They don't have uteruses!"
The answer is: the uterus isn't what causes your period, it is effected by your period. What causes your period and what causes trans women's periods is the same thing: the endocrine system.
HRT changes the sex of your endocrine system. Feminizing HRT makes it a female endocrine system, giving us a 28-day hormone cycle just like cis women. At the end of that cycle, the hypothalamus floods the body with prostaglandins. Those are what cause all but one of the period symptoms, because they make muscles inflame and contract. They are what make the uterus shed its lining, they are what cause intestinal cramps, they are what cause body aches, they are what cause headaches and migraines. The only period symptom not causes by the release of prostaglandins throughout the body is depression, and that is caused by your endocrine system simply not processing as much estrogen and from simply feeling like shit.
So, the only symptoms trans women don't get every 28 days is menstrual cramps, because yes we do not menstruate since we don't have uteruses. But migraines, depression, body aches, intestinal cramps, and the infamous "period shits" don't exactly add up to us having any better of a time. Except we have to pretend that we're fine and nothing is different because no one believes that we get periods, not even cis women.
"But you can't call it a period then because that refers to MENSTRUATION!" is another one I hear all the time. This is incorrect. You use the word "period" instead of just "menstruation" because it doesn't just refer to menstruation. It refers to a period at the end of the hormone cycle where we experience a host of symptoms. And not all cis women experience all of the symptoms that encompass the period. Not all cis women get migraines, or body aches, or have severe depression. If a cis woman gets a hysterectomy she doesn't menstruate either! In that instance she experiences an identical period to what trans women experience. Yet, I doubt you'd insist that cis women who've had hysterectomies don't have periods.