This is one of the most common questions patients ask their fertility doctors and/ or their OBGYNs. Fortunately the short answer is no and this is backed up by large research studies. While their purpose may be to prevent pregnancy, the contraceptive effect of the pill wears off rather quickly. In some women the return to normal cycles and fertility can take a number of months, but usually there is not much of a delay. In other women, such as those with ovulation disorders such as PCOS, coming off the pill may actually increase the chances for conception. If your cycles have not regulated themselves 6 months after stopping the pill or they are becoming less regular over time after then and you're trying to get pregnant, it's probably not the pill, and it's time to discuss this with your GYN or fertility specialist.