Starting my period the day we left for Italy didn’t just seem inconvenient (who wants to deal with the heaviest flow day on an 8-hour flight?), but I thought it spelled certain doom for my race at the World Snowshoe Championships. Turns out I couldn’t have been more wrong, well except for

Helpful chart on understanding our menstrual cycles

Whether you’re trying to become pregnant or you just want to know more about your body, it’s important to be familiar with the stages of your menstrual cycle. Tracking your period can help you become more attuned to your health and even help you conceive! The following chart shows the different lengths of each stage for the average 28-day cycle, but you shouldn’t worry if

Glow is an ambitious enterprise that uniquely applies the power of data science to health. We tackle topics like menstruation, sex, fertility, pregnancy, and parenthood head-on, harnessing our powerful ability to crunch vast amounts of data to investigate the science behind these life stages.

Which day are you most relaxed? Most flirty? A bit grouchy? There's more to your menstrual cycle than just your period.

Menstruation cycle chart

hormones and the menstrual cycle