27 Day Cycle Overview
Ovulation: Day 13
High Fertility: Day 8 – 14 | Next Period: Day 28
Your Fertile Window Explained
Because the luteal phase (post-ovulation) is almost always 14 days, a 27-day cycle means you ovulate around Day 13. Sperm can survive up to 5 days internally, meaning your highest chances of conception fall exactly between Day 8 and Day 14.
Your Specific Cycle Metrics
| Cycle Day | Biological Event |
|---|---|
| Day 1 | First day of period (Full Flow) |
| Day 8 - 14 | High Fertility Window |
| Day 13 | Estimated Ovulation |
| Day 28 | Next expected period / Testing Day |