Tracking your cycle when you are not ovulating feels pointless until you understand what you are actually looking for. Anovulation, the absence of ovulation in a cycle, is one of the most common features of PCOS, and it is also one of the most undertracked. Most period apps assume ovulation happens every cycle. For many women with PCOS it does not, and a tracker that assumes otherwise produces misleading data at best and false reassurance at worst.
"I tracked for six months before realising I had never actually ovulated"
This realisation appears repeatedly in PCOS communities. Women describe months of logging period dates and accepting app predictions, then trying LH strips or BBT charting for the first time and discovering no ovulatory signal had ever occurred. The app had been drawing a fertile window on a cycle that had no fertile window.
The community insight that follows is consistent: you cannot track anovulation with a period-only app. You need a direct ovulation signal, either a positive LH strip, a BBT thermal shift, or both, to confirm whether ovulation occurred in any given cycle. If neither signal appears across multiple cycles, that is anovulation, and it is clinically significant data regardless of whether periods are still arriving.
Periods can occur without ovulation. These are called anovulatory cycles and they happen when the uterine lining builds up sufficiently to shed even though no egg was released. They can look like normal periods on a tracking app and feel similar in terms of bleeding, which is why so many women with anovulatory PCOS do not realise ovulation is absent until they start looking for it directly.
What research says about anovulation in PCOS
Anovulation is one of the three diagnostic criteria for PCOS under the Rotterdam criteria, alongside hyperandrogenism and polycystic ovarian morphology on ultrasound. Two of the three criteria are required for diagnosis, and anovulation is present in the majority of PCOS cases.
The mechanism involves disrupted LH pulsatility from the hypothalamus, which fails to trigger the LH surge required for follicle rupture and egg release. Elevated LH levels are common in PCOS, but the surge pattern required for ovulation does not occur reliably. This means follicles develop but often do not release, which is the origin of the cystic appearance on ultrasound.
Research on anovulation tracking in PCOS finds that BBT charting is more reliable than LH strips alone for confirming ovulation, because elevated baseline LH in PCOS can produce false positive LH strip results that mimic a surge without triggering actual ovulation. Using both methods together, a positive LH strip followed by a sustained BBT rise of at least 0.2 degrees Celsius, provides the most reliable confirmation.