21 Day Cycle Overview
Ovulation: Day 7
High Fertility: Day 2 – 8 | Next Period: Day 22
Your Fertile Window Explained
Because the luteal phase (post-ovulation) is almost always 14 days, a 21-day cycle means you ovulate around Day 7. Sperm can survive up to 5 days internally, meaning your highest chances of conception fall exactly between Day 2 and Day 8.
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 |