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1st Day of Last Menstrual Period: (MM/DD/YYYY format) Average Length of Cycles: (22 to 45) (defaults to 28) Average Luteal Phase Length: (9 to 16) (defaults to 14) Estimated Ovulation: Estimated Due Date: Estimated Fetal Age:
Our ovulation calculator provides dates for predicting ovulation. For best accuracy you may want to use this along with other tools such as a BBT Chart.