Why Your Fertility Tracker App May Be Inaccurate

I am a woman, but I am also a scientist, which means I love anything that can help make my life as a woman easier, but I want to be sure the data it is accurate and reproducible. Therefore I’ve been doing an experiment recently to compare the effectiveness and predictive ability of several fertility tracker methods, including Basal Body Temperature charting (I’ll explain this in more detail below) and several common apps.