Your Fertility Window Report

Tool 01 of 06

Your Fertility Window Report

A clearer picture of your cycle, your peak days, and what they mean. No accounts, no tracking. Your information stays on your device.

Your information never leaves your device.
Question 1 of 7
About your cycle

First day of your last period?

The very first day of bleeding (not spotting). If you are not sure, your best guess is fine.

About your cycle

Typical cycle length?

From day 1 of one period to day 1 of the next. The average is 28 days. Anywhere from 21 to 40 is normal.

days
About your cycle

How regular are your cycles?

This helps us decide whether to give you one date or a window.

About you

Your age band?

We use this for honest context, not predictions.

Your situation

How long have you been trying?

If you are not trying yet, pick the first option.

Your goal

What brings you here?

We will tailor the wording of your report.

Optional

Any tracking data to share?

Skip this step if you do not track. Otherwise add a note about a recent positive OPK or a sustained BBT rise.

One more thing. This is educational information, not medical advice. Predictions are estimates based on averages and cannot confirm ovulation or pregnancy. Irregular cycles reduce accuracy.
Your report

Your Fertility Window

Based on the cycle information you provided. Estimates only, not a diagnosis.

This cycle at a glance
—
Estimated ovulation
—
Fertile window
—
Peak days
—
Earliest reliable test
Per-day chance of conception

Relative probability across the fertile window. Peak chances are typically the two days before ovulation. Source: Wilcox et al. (1995), New England Journal of Medicine.

Your best days to try

Your cycle, explained
Next 3 cycles

A forward look. Each cycle is projected from the one before. Save or print to use as a planner.

Fertile Peak Ovulation Test day
Age context

When to consider seeing a specialist

This is educational information, not medical advice or a diagnosis. Always confirm anything here with your own clinician or clinic. If the tool ever contradicts what they have told you, your clinic is right.