Braxton Hicks Session Input
Use the live timer or enter start and end times manually.
Example Data Table
| # | Start | End | Duration | Interval | Intensity | Trigger |
|---|---|---|---|---|---|---|
| 1 | Mar 17, 2026 18:00 | Mar 17, 2026 18:00 | 00m 42s | — | 3/10 | Walking |
| 2 | Mar 17, 2026 18:11 | Mar 17, 2026 18:12 | 00m 51s | 11m 10s | 4/10 | Standing |
| 3 | Mar 17, 2026 18:27 | Mar 17, 2026 18:28 | 00m 47s | 15m 42s | 3/10 | Dehydration |
| 4 | Mar 17, 2026 18:49 | Mar 17, 2026 18:49 | 00m 38s | 21m 18s | 2/10 | Position change |
Formula Used
Duration per entry: Duration = End Time − Start Time
Start-to-start interval: Interval(i) = Start(i) − Start(i−1)
Rest time between entries: Rest(i) = Start(i) − End(i−1)
Average duration: Average Duration = Sum of all durations ÷ Number of entries
Average interval: Average Interval = Sum of all start-to-start intervals ÷ Interval count
Consistency score: 100 − ((Standard Deviation of Intervals ÷ Average Interval) × 100)
The consistency score is a simple variability indicator for tracking sessions. It is not a medical scoring system and should never be treated as a diagnosis.
How to Use This Calculator
- Enter optional session context such as gestational weeks, hydration, activity, and position.
- Use the live timer or add entries manually with start and end times.
- Rate each tightening from 1 to 10 and note location or possible triggers.
- Press Calculate Session to view the result summary above the form.
- Review durations, intervals, rest time, and the Plotly chart for pattern changes.
- Download CSV or PDF if you want a shareable record for later review.
- Use the notes field to record factors like hydration, rest, or position changes.
- For concerning symptoms, use medical advice from your clinician or maternity service.
FAQs
1. What does this timer help me track?
It tracks each tightening’s start time, end time, duration, spacing, rest period, intensity, and notes. That makes session review easier and more organized.
2. Is this calculator a labor diagnosis tool?
No. It only organizes timing data and trends. It cannot confirm labor, rule out labor, or replace individual advice from a qualified maternity clinician.
3. Why does the calculator show start-to-start intervals?
Start-to-start intervals show how far apart tightenings begin. That view is useful when comparing rhythm, regularity, and whether a session is becoming more patterned.
4. Why track intensity and location too?
Timing alone misses context. Intensity, body area, and notes help you compare how each tightening felt and whether the pattern seems to be changing.
5. Can I use the live timer instead of typing times?
Yes. Start the live timer when a tightening begins and stop it when it ends. The tool fills the active row automatically for quick logging.
6. Why is there a consistency score?
The score is a simple variability measure based on interval spread. Higher values suggest more regular timing, but the number is only for tracking sessions.
7. When should I stop relying on a tracker and get help?
Use medical advice promptly for bleeding, fluid leakage, reduced fetal movement, severe pain, or any symptom pattern that concerns you. A tracker should never delay care.
8. Can I export the session for later review?
Yes. After calculation, you can download CSV or PDF reports that include your summary values and detailed entry table for your records.