How Do Fertility-Tracking Technologies Define Ovulation and Anovulation? A Structured Landscape Analysis

The authors aimed to characterize how various commercially available fertility-tracking technologies define ovulation and anovulation, as well as to evaluate the evidence supporting their claims and the user burden associated with these devices. Their analysis revealed significant variability in the operational definitions of ovulation and anovulation across 19 technologies, with a lack of explicit definitions for anovulation and limited comparator evidence against established physiological standards. The study highlights the need for improved transparency and more rigorous evaluations, particularly for users with irregular menstrual cycles.