The short answer is no, as they are likely to give misleading results, ovulation tests and fertility monitors are not designed for women with ongoing anovulation due to an underlying hormonal disorder such as PCOS. Clearblue Ovulation Tests identify the onset of ovulation by detecting a surge of LH above a baseline level. Women with PCOS may have a high baseline level of LH, and so there may not be a sufficient change in LH for the test to detect a surge, so ovulation may not be indicated. Or the baseline may be so high that it appears the surge is already underway, and the test will indicate ovulation on the first day of testing.