Just as at other times, it is important to chart while breastfeeding, even if cycling is delayed for many months. Ovulation can precede your first bleeding, and you will need to make observations as well as chart and interpret them to know when you become fertile. Because ovulation may not occur for many months, the cervical mucus observation is the focus during this time. However, it is recommended, for Sympto-Thermal users, that the temperature observation be made as well. It is important to work with a certified NFP Provider for feedback during this time.