Ovulation Calendar
Track your ovulation and fertile window for conception planning or natural family planning.
Ovulation Calendar
Note: This calculator is for educational purposes only and should not replace professional medical advice.
Understanding Your Fertility Cycle
Menstrual Cycle Phases:
- Menstrual Phase (Days 1-5): Period bleeding occurs
- Follicular Phase (Days 1-13): Eggs mature in ovaries
- Ovulation (Day 14): Egg is released from ovary
- Luteal Phase (Days 15-28): Uterine lining thickens
Fertility Signs:
- Changes in cervical mucus (clear, stretchy)
- Slight increase in basal body temperature
- Mild pelvic or abdominal pain
- Breast tenderness
- Increased libido
Conception Probability:
5 days before ovulation:
10%
3 days before ovulation:
15%
1 day before ovulation:
30%
Ovulation day:
20%
1 day after ovulation:
10%
Important Notes:
- Sperm can survive up to 5 days
- Egg survives 12-24 hours after ovulation
- Stress can affect ovulation timing
- Cycle length can vary month to month
Medical Disclaimer: This tool provides estimates based on average cycle data.
For accurate fertility tracking, consult with healthcare professionals and consider using
additional methods like basal body temperature and ovulation predictor kits.
Cycle History
Your cycle calculations will be saved here for tracking.
Fertility Facts
- Fertile window is typically 6 days long
- Peak fertility is 1-2 days before ovulation
- Most women ovulate 14 days before next period
- Age affects fertility - peaks in early 20s
- Regular cycles are easier to predict
Related Tools
Cycle Length Guide
| Cycle Length | Ovulation Day |
|---|---|
| 21 days | Day 7 |
| 25 days | Day 11 |
| 28 days | Day 14 |
| 30 days | Day 16 |
| 35 days | Day 21 |