Understanding Predictions
How Lova calculates your next period, ovulation, and fertile window.
How Predictions Work
Lova predicts your cycle based on your personal history, not assumptions. The algorithm analyzes:
Your logged period dates
Average cycle length
Natural variation patterns
Additional data (symptoms, BBT)
Period Predictions
Your next period is predicted based on:
- • Your average cycle length (e.g., 28 days)
- • Your typical variation (e.g., ±2 days)
- • Recent cycle patterns
Prediction Confidence
Lova shows confidence ranges. "Expected Dec 15 (± 2 days)" means Dec 13-17 is most likely.
New Users
With limited data, Lova:
- • Starts with a 28-day assumption (average)
- • Asks about your typical cycle length
- • Quickly adapts to your actual pattern
Ovulation Predictions
Ovulation typically occurs 12-16 days before your next period. Lova estimates:
- • Most likely ovulation day based on your luteal phase
- • Confidence window (usually 3-4 days)
Estimates Only
Ovulation predictions are estimates. For conception or contraception purposes, use additional methods (OPKs, BBT) for confirmation.
Fertile Window
The fertile window includes:
- • 5 days before ovulation (sperm can survive)
- • Ovulation day
- • 1 day after ovulation (egg viability)
Lova highlights this window on your calendar.
Reading the Calendar
Red days
Logged period
Light red
Predicted period
Blue/purple
Fertile window (if enabled)
Star
Predicted ovulation
Improving Accuracy
Let Data Guide You
Rather than manually adjusting cycle settings, continue logging accurately. Lova will learn and adapt to your actual patterns over time.
When Predictions May Be Off
Predictions are less reliable when:
Adjusting Predictions
If predictions seem consistently off:
- 1. Go to Settings → Cycle Settings
- 2. View Cycle Length and Luteal Phase
- 3. Adjust if you know your typical values