[freirin]

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.

[gblargg]

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

[mghackerlady]

There are multiple factors like dosage and specific hormone regimen (some do monotherapy while others do estrogen and a anti-androgen), but generally yes