I followed keto for almost 2 years & my cycle went from twice a year (if I was lucky) to every 28 days, like clock work. For the last month I've gone back to eating carbs (stressed out & needed a break) and I'm already 3 days late and feel like utter crap! I'll be going back to keto (or at least very low carb) very soon.

There are a ton of threads discussing this issue in the Keto and LCD groups already. But yeah, it jacks it up one direction or the other for nearly every female on Keto.

It is temporary to be off-kilter, then seems to resume or establish an improved state over previous PCOS misery. As I've indicated in other posts, I take continuous birth control pills due to POP, but my endocrinologist is still tracking my hormone production, and everything has improved while being low carb, including break through bleeding and crazy cramps/mood swings I was having DESPITE being on BCP... So, I think, within 4-6 months, as your hormones and such level off (possibly more or less after pregnancy/childbirth/nursing), that you would reach an improved state. While the particular types of having our cycles screwed up are slightly different, the fact is, non-PCOS stricken women share certain hormone issues with us while adjust to a ketogenic diet, and so while the particulars are different, the hormonal upsets are similar, and the settling rate is similar as well. So while they may get lighter, we may get heavier, or what have you. Not only that, within PCOS, we're all so different. I would say that if you keep your dietary intake steady for 3-6 months (meaning no cheating binges or crazy high carb days - because that will gunk up the whole works) and don't see improvements, then I would go in for testing or something... But yes, overall, long term, a low carb diet is very beneficial for a HUGE number of reasons for PCOS sufferers.