The OvWatch measures changes in perspiration and requires the user to attach a sticky patch to their skin and wear a watch every day, except during times of possible accumulation of moisture on the skin, such as during periods of exercise, heat, or humidity. Unfortunately, there are more than 400 medical conditions which can cause perspiration, including common conditions such as anxiety, hypoglycemia, and hyperthyroidism. Further, there are a number of conditions which can cause perspiration that relate specifically to one’s fertility, such as perimenopause and polycystic ovarian syndrome. There are also a number medications that may increase perspiration or alter its composition. OvWatch does not work for women with irregular cycles or women taking ovulation-inducing medications. There are monthly costs for the patches you must continually buy. Read a detailed comparison of OvaCue and OVWatch.
Saliva microscopes operate on the principle that salivary characteristics can indicate the onset of ovulation. However, the accuracy of these products is dependent on the user’s ability to interpret results which for many women are quite ambiguous. In addition, the process of collecting saliva itself can distort the results. While ferning scopes may be helpful in predicting ovulation, they cannot approach the accuracy, convenience or comprehensive readings offered by the OvaCue Fertility Monitor.