BBT Ovulation Chart

No. Due to its susceptibility to external factors and the natural variations in menstrual cycles, BBT ovulation tracking should not be relied upon for preventing pregnancy. Other contraceptive methods, such as barrier or hormonal methods, should be used.

BBT can be influenced by factors that raise or lower your body temperature. This could be emotional factors, an infection, your external environment, alcohol consumption, or other factors.

BBT needs to be measured daily for this chart to detect the nadir and rise in temperature associated with ovulation.