It took me a long time to figure this out: my MG symptoms get much worse a couple of days before my period starts. But I also have a really weak day in the middle of my cycle. Since I take my morning (basal) temperature in order to chart my cycle, I've noticed that this awful MG day coincides with ovulation. Evidently both hormone-shifts set off my MG symptoms.

I'm just passing this on in case it might be helpful to other women who are trying to figure out some of their triggers.

Abby