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Luteal Phase Calculator
Calculate your ovulation date, fertile window, and luteal phase length
Gynecology Guidelines: The luteal phase is the second half of the menstrual cycle, starting right after ovulation and lasting until the next period (typically lasting 12 to 14 days). Enter your cycle details below.
Cycle Parameters Input
Calculation Results
⚠️ Not medical advice. For reproductive health, gynecology, and reference only. Fertility tracking, menstrual irregularities, and family planning should be evaluated and supervised strictly by a qualified gynecologist or healthcare professional.