Fertility Chart Interpreter 📈
Log daily signs and see an estimated ovulation window.
Fertility Chart Interpreter
Log daily signs for this cycle. Data stays on your device.
Calculated on your device. Nothing is sent or stored unless you choose to save it.
Estimates are educational, not diagnosis or medical advice. Always consult a qualified clinician.
The three signs of fertility awareness
Fertility awareness methods read your body's own signals to estimate when you ovulate. Three signs do most of the work. Your basal body temperature rises by around 0.3°C after ovulation, so a sustained shift confirms it has happened. Your cervical mucus becomes clear, stretchy, and egg-white-like in the most fertile days before ovulation. And an LH test turns positive in the 24 to 36 hours before the egg is released.
How the interpreter reads your chart
Used together, these signs cross-check each other: mucus and a positive LH test point to the fertile window opening, while the temperature shift confirms ovulation has passed. This tool combines the days you log into an estimated ovulation day and fertile window. Charts take a cycle or two to read confidently, and illness, poor sleep, or travel can affect your temperature. For a quick calendar estimate alongside your chart, use the ovulation calculator, and the fertility awareness guide explains each sign in more depth. This is educational and not medical advice.
FAQs
- What signs does the chart interpreter use?
- Basal body temperature shift, peak fertile mucus (watery or egg-white), and LH positive tests — the core symptothermal signs.
- Is my chart data stored?
- No. Everything is calculated in your browser and never sent to our servers.