I usually go out of Ketosis before TOM and for a few days into it.

I also seem to go out of Ketosis about a week and a half later as I ovulate.

So, for me, hormonal cycles seem to affect the amount of ketones present in my urine and, I believe, my fat loss. I.E. hormones seem to affect the times during the month that my body wants to deal with getting rid of the excess fat.

I think this applies to most women who are still menstruating. I also think this is why men tend to lose their weight faster and more consistently--because they don't have the dramatic monthly changes in hormones that we do.

Anyway. that's my 2 cents worth. Hope it helps.