The article covers this in detail, but I can share our experiences in the opposite direction: We used charting to maximize our chances of getting pregnant. Acc

The article covers this in detail, but I can share our experiences in the opposite direction: We used charting to maximize our chances of getting pregnant. Accurate fertility tracking requires multiple signals. When we were trying to get pregnant, my wife used body temperature, ferning, timing of her period, and the viscosity of her discharge all together. Combining the signals gives a remarkably clear picture, but temperature alone has a lot of noise. Our charting tool also had a slot for logging sex, too. Most of the userbase we had contact with were actively trying to get pregnant and many had difficulty doing so. Being able to track past history allows you to phase-shift sexy time against the cycle to try and get the timing just right. I should mention that for couples who are trying to get pregnant unsuccessfully, the entire process can be extremely stressful. So while trying to shoot a perfect timing bullseye doesn't make a whole lot of sense physiologically, desperate people will try to tease out any signal they can for explaining why they can't get pregnant. FTA: > but 54 percent of those women dropped out within the first year, That's not at all surprising. Rhythm method charting takes a fair amount of work and regularity that makes it something of a pain. There's also better tools for it than this app. Their target userbase seems to be couples that are both dedicated anti-contraceptionists and ~~lazy~~ less than fully vigilant. I suspect the reality is that many users were trying it out just to learn about their own bodies, but were otherwise relying on other contraceptive methods. Once the curiosity wore off, they stopped using it.