Calculator inputs
Example data table
| Profile | Age | Cycle | Timing | BMI | Trying months | Score | Band |
|---|---|---|---|---|---|---|---|
| Profile A | 29 | 28 days, ±2 | 85% | 22.6 | 3 | 88.6 | More Favorable Planning Pattern |
| Profile B | 35 | 31 days, ±5 | 68% | 27.1 | 9 | 70.2 | Generally Supportive Pattern |
| Profile C | 39 | 38 days, ±9 | 40% | 33.4 | 18 | 47.8 | Several Watchpoints |
Formula used
The calculator uses a weighted score out of 100. Each category earns points up to its maximum weight, then all category scores are added.
| Category | Weight | How it is scored |
|---|---|---|
| Age | 20 | Higher points at younger reproductive ages. Points taper with increasing age. |
| Cycle Pattern | 12 | Combines cycle length quality and month-to-month cycle variation. |
| Ovulation Cues | 10 | Ovulation cue confidence percentage divided by ten. |
| Fertile Window Timing | 12 | Timing quality percentage multiplied by 0.12. |
| BMI Range | 8 | Higher points for BMI ranges closer to the model's central band. |
| Lifestyle | 8 | Smoking status and weekly alcohol intake are scored together. |
| Sleep and Stress | 8 | Combines sleep duration quality and self-rated stress level. |
| Activity Balance | 5 | Rewards moderate weekly activity more than very low or extreme volumes. |
| Trying Duration | 5 | Shorter trying duration scores higher within this planning model. |
| Prior Pregnancy History | 4 | Prior pregnancy adds points, but lack of prior pregnancy does not zero the category. |
| Partner Age | 4 | Points taper gradually as partner age rises. |
| Known Conditions | 4 | No known conditions scores highest; known concerns reduce points. |
Total Score = Sum of all category points. The result is an educational planning score, not a medical diagnosis.
How to use this calculator
- Enter recent, realistic values instead of ideal targets.
- Use three or more recent cycles when estimating cycle length and variation.
- Rate ovulation cues and timing quality honestly for better output.
- Review the total score, band, strongest areas, and main watchpoints.
- Use the graph and breakdown table to spot the categories that need attention.
- Download the results as CSV or PDF if you want to save or share them.
- Repeat the calculator after meaningful changes in sleep, lifestyle, tracking, or cycle data.
- Discuss persistent concerns, irregular cycles, or prolonged trying time with a clinician.
FAQs
1. What does the fertility score measure?
It summarizes planning-related factors such as age, cycle pattern, ovulation cues, timing, BMI, lifestyle, stress, trying duration, partner age, and known conditions. It helps organize observations, but it does not diagnose infertility or predict pregnancy with certainty.
2. Is a high score a guarantee of pregnancy?
No. A high score only means your entries look more favorable within this model. Conception still varies by month, partner factors, health history, and chance.
3. Can irregular cycles reduce the score?
Yes. Larger month-to-month cycle swings make ovulation timing less predictable, so the cycle component loses points when recent cycle lengths vary more.
4. Why is age weighted more heavily?
Age can strongly influence ovarian reserve and egg quality over time, so this model gives age a larger weight than several lifestyle categories.
5. Why does partner age appear in the model?
Conception depends on both partners. Partner age can affect reproductive planning, but this calculator still cannot replace semen analysis or clinical assessment.
6. When should someone speak with a clinician?
Consider advice sooner if cycles are highly irregular, if known conditions exist, or if trying has continued for many months without success.
7. Can lifestyle changes improve the score?
Often, yes. Stopping smoking, limiting alcohol, improving sleep, moderating stress, and maintaining balanced activity can improve several categories.
8. Is this suitable after miscarriage or fertility treatment?
Use it only as a discussion aid. Individual guidance after miscarriage, assisted reproduction, or major medical conditions should come from your clinician.