21 Day Cycle Overview
Ovulation: Day 7
High Fertility: Day 2 – 8 | Next Period: Day 22
Phase Breakdown & Health
A 21-day cycle is composed of two main halves. The first is your Follicular Phase (lasting roughly 7 days). The second is your Luteal Phase, which is structurally fixed at around 14 days. If you recently stopped hormonal birth control, expect it to take 3-6 months for your natural 21-day rhythm to fully stabilize.
Your Specific Cycle Metrics
| Cycle Day | Biological Event |
|---|---|
| Day 1 | First day of period (Full Flow) |
| Day 2 - 8 | High Fertility Window |
| Day 7 | Estimated Ovulation |
| Day 22 | Next expected period / Testing Day |