For women with an irregular cycle, it might be difficult for them to accurately track ovulation. “If cycles are very irregular and inconsistent, using menstrual history alone to predict ovulation will alone not be sufficient,” Dr. Kroener says. “While other markers such as OPKs, cervical mucus, and basal body temperature can be attempted, it is much more difficult to know when to track these markers and when to expect signs of ovulation.”  Even though you might not be able to chart when your ovulation starts with 100 percent accuracy, tracking your experience throughout your cycle could still be beneficial. “Even if one piece by itself may have some plus-minus accuracy, you can still chart putting it all together to make some sense out of your cycle,” Dr. Baker says. “For example, charting can help you to know if you are bleeding only during your expected menstrual time or are bleeding throughout the month.” This information is beneficial for a healthcare provider to know during your next visit, no matter if your cycle is regular or irregular.