I always start my period on a saturday but i started on friday? is that normal?

Mind Over Matter??: That's a stunner.I'm not familiar with a menstrual cycle tied to the exact days of the week.They're usually tied to their own inner biologic/hormonal clock,which can be variable but not,to my knowledge,constant in relationship to days of the week.I'd say off the cuff that a one-day variance in your particular pattern shouldn't matter much.I'd also say you're an unusual case.Give a call to Art Bell