Extended Water fasting questions

So I did a 20 day water fast several years ago but honestly didn’t track much about my menstrual cycle after and really wanting to know other women’s experience with extended water fasting. I understand this is a controversial topic and ask that those with strong opinions against water fasting please refrain from commenting as I feel confident in my decision and research to do this again.

For those who have tried it please share the good, the bad, and the ugly as it’s just so hard to find information about this in general and especially on how it may affect fertility and cycles. Thank you all who share and looking forward reading your accounts and experiences!