Let’s be honest – periods can be very annoying. But of all of the stresses that they cause, the one benefit they have is that they are predictable. Unless you are within your first two years of having a period, it should be easy to figure out from month to month when bleeding will start and stop, what days your cramps will be at their worst and when ovulation will happen. Here is a brief step-by-step guide to tracking your menstrual cycle. Materials you will need: a calendar, calculator and pen (or, coming soon, our app!).