Estimate your ovulation window with PCOS using period history or irregular cycles plus signs like OPK, cervical mucus, and BBT. See probability bands (ovulating now/soon/unlikely), the best next two days to try, when to test, and a tip to confirm if unsure.
How this calculator works
- Inputs: last period start or irregular/no period, typical cycle length if known, OPK result and date (optional), cervical mucus today (dry, sticky, creamy, watery, egg-white), BBT rise seen this cycle (Y/N, optional), medications (letrozole, clomiphene, metformin, none), age (optional).
- Outputs: an estimated ovulation window for this cycle, probability bands (“ovulating soon”, “ovulating now”, “unlikely this cycle”), the best next two days to try, when to test for pregnancy if trying, and a tip to confirm with OPK or BBT if uncertain.
Methodology & sources
The estimate starts with your reported period timing or typical cycle length, then refines using current-cycle signs. A positive OPK and egg-white mucus increase the “ovulating now” likelihood. A sustained BBT rise supports that ovulation has already occurred. Medication selection is used for context and tips; it does not confirm ovulation. Test timing is based on the predicted window and common home test guidance.
Cycles with PCOS can be irregular. This tool cannot diagnose or replace clinical care. For personalised advice, talk to a clinician.
Frequently asked questions
Can you ovulate with PCOS?
Yes. Many people with PCOS ovulate, but timing can be irregular. This tool estimates a window from your inputs and suggests ways to confirm it.
Do OPKs work if I have PCOS?
OPKs can still help, but some people with PCOS have higher baseline LH. Look for a clear positive and pair it with mucus changes or a later BBT rise.
What does “ovulating now” mean?
It reflects signs that usually cluster near ovulation, such as a recent positive OPK and egg-white mucus. It is still an estimate, not a diagnosis.
Do medications change the result?
Medication info is used for context and tips only. It does not prove ovulation. Follow your prescriber’s plan and monitoring advice.
When should I take a pregnancy test?
After the predicted window or when your period is late. The tool suggests a first reliable day to test, based on your inputs.