Anovulation (Lack of Ovulation)
Anovulation is defined as a menstrual cycle that lacks ovulation, and it can happen for many reasons. Anovulation can occur in an individual with otherwise healthy menstrual cycles in response to things like extreme stress, heavy exercise, eating disorders, or low body fat percentage. In the sample chart above, you can see that basal body temperature (BBT) never exhibits a sustained increase, which is a telltale sign of anovulation. Folks experiencing anovulation may also notice several false peaks, or peak days that are not followed by a rise in basal body temperature. False peaks tell us that the body is attempting to ovulate, but is unsuccessful.