[nomilk]

Are the use cases for period tracking: 1. helps planning (e.g. same way a weather app helps decision making around when to do / not do various activities), and 2. improves accuracy of estimating whether conception may have occurred (vs not tracking).

Are these correct; are there others?

[entwife]

Use cases: health indicators, avoiding conception, achieving conception, and accurate pregnancy dating.

A well developed period tracking system with a long history is the Creighton Method. Briefly, individuals are trained person-to-person to collect consistent, reliable repeatable data. This can be compared between users, and has many uses. However, the data collection is inconvenient or in some cases impossible, and they will only train married women.

[badcppdev]

> and they will only train married women.

Who is 'they'? I'm going to have to dive into google aren't I?

Edit: Ok. Returned from rabbit hole. They = religious types who have thoughts about conception and contraception.

[jeffheard]

If you’re regular and become irregular, it’s often a sign that something is off, or if you’re into middle age, that your body’s hormone balance is changing. In either case it’s something to pay attention to and maybe mention to your doc next time you see them.