Luteal Phase Calculator
Health & FitnessCalculate the length of your luteal phase and see whether it falls within a typical range.
Luteal Phase Length
The number of days between ovulation and the start of your next period.
Category
Normal luteal phase
A luteal phase of 11 days or less is considered short and can sometimes make it harder to conceive. A typical luteal phase lasts 12 to 17 days.
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Frequently Asked Questions
What is the luteal phase?
The luteal phase is the time between ovulation and the start of your next period. Unlike the first half of your cycle, the luteal phase is usually fairly consistent from cycle to cycle for the same person.
What counts as a short luteal phase?
A luteal phase of 11 days or less is generally considered short. A short luteal phase can sometimes make it harder for a fertilized egg to implant successfully.
How do I find my ovulation day and period start day?
You can track ovulation using basal body temperature charting, ovulation predictor kits, or cervical mucus changes, and note your next period start date from your calendar.
Should I be concerned about a short luteal phase?
If you consistently notice a luteal phase of 11 days or less while trying to conceive, it is worth discussing with a healthcare provider.
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