How to Use the Periodic Table Calculator to More Accurately Predict Menstrual Cycles Menstrual cycles refer to a series of physiological changes that occur in female reproductive organs according to a certain cycle and rhythm. By calculating cycles, women can accurately predict their menstrual cycles and plan their lives and work. Using the periodic table calculator allows women to predict menstrual cycles more conveniently and quickly. This article will introduce how to use the periodic table calculator to predict menstrual cycles more accurately from four aspects. Aspect one