Learn your cycle
Interactive chart examples and day by day guides, written plainly, cited to real research, and honest about what your body's signals can and cannot tell you.
BBT charts, explained interactively
BBT chart: pregnant vs not pregnant
Toggle between real-shaped example charts and see exactly how the patterns differ, and how much they overlap.
Start here 📉Implantation dip
What a mid-luteal temperature dip looks like, and the honest stats on how often it appears in pregnancy and non-pregnancy charts.
Most searched 📊Triphasic chart
The three-level temperature pattern: what causes it, when it appears, and what it does and does not mean.
Pattern guide 🖼️BBT chart gallery
Five interactive example charts: textbook biphasic, pregnancy, triphasic, anovulatory, and implantation dip.
Browse examples ↩️Fallback rise
When your temperature rises, falls back, then rises again: why it happens and how to read it.
Pattern guide 🪜Slow rise
The staircase pattern after ovulation: what a gradual temperature shift means for your chart.
Pattern guide 1️⃣8️⃣The 18 day rule
The classic charting rule: 18 elevated temperatures past ovulation with no period is the strongest sign your chart can give.
Classic rule