Not quite! While trans women obviously don't have menstrual cycles a good chunk of the population suffer from period-like symptoms/PMS just due to similar hormonal fluctuations.

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gblargg a day ago | parent [-]

Aren't those 100% predictable since they are caused by external application of said hormones?

	▲	mghackerlady a day ago \| parent [-]
		There are multiple factors like dosage and specific hormone regimen (some do monotherapy while others do estrogen and a anti-androgen), but generally yes