There are two key times to alter your fasts: when your hormone levels peak at ovulation and the week before your period starts. Remember, when your sex hormones are at their highest—ovulation and the week before your period—your fasts should be shorter. When your hormone levels are low—when your cycle first starts and post ovulation—your fasts can be longer. You will see how this all plays out with the Fasting Cycle in Chapter 8.
