30 Day Cycle Overview
Ovulation: Day 16
High Fertility: Day 11 – 17 | Next Period: Day 31
Tracking a 30-Day Cycle
For a consistent 30-day cycle, your next period will begin exactly 30 days after the first day of full bleeding from your previous cycle. While apps use averages, your biology dictates that the follicular phase (the days leading up to ovulation) is what causes this specific length.
Your Specific Cycle Metrics
| Cycle Day | Biological Event |
|---|---|
| Day 1 | First day of period (Full Flow) |
| Day 11 - 17 | High Fertility Window |
| Day 16 | Estimated Ovulation |
| Day 31 | Next expected period / Testing Day |