If An Ovulation Predictor Test Kit Says Positive, That Means That I Am For Sure Ovulating, Right?

Ovulation predictor kits determine whether the luteinizing hormone (LH) is detected. The luteinizing hormone (LH) rises right before ovulation occurs. Therefore the kits are supposed to detect whether you’re going to ovulate but cannot ensure that you do ovulate.

Women may have a high level of the LH if they have certain conditions such as polycystic ovaries, premature ovarian failure (POF), or for women over age 40 who are experiencing perimenopause. Also, women with Luteinized Unruptured Follicle Syndrome (LUFS) may have a surge in the LH hormone without ovulating. Any of these conditions could result in a false positive result on an ovulation predictor test.

http://americanpregnancy.org/getting-pregnant/ovulation-faq/