Did Anyone Else Experience Unusually Regular Cycles While on Fluoxetine?

My cycles have never been regular. Usually they are 30-40 days long, but they can be as long as 45-50 days. I have been recording them since 2020, and the only time period where I had stable, normal length cycles for more than 3-4 months in a row was when I was on Fluoxetine. On Fluoxetine, I had 7 cycles between 29-33 days long, then a 49 day cycle when I was tapering off, and they went back to my normal (4-10 days of difference between the lengths of two consecutive cycles) immediately.

Has anyone else experienced SSRI's making their cycles more regular? It can't be just because they stopped my depression from messing up my cycle, because my cycles are very irregular when I am not depressed and not on any antidepressants.