How a menstrual cycle actually works (and what your app isn't telling you)
A short class from the Gaux library — credentialed teaching, ten minutes you can use tonight.
What this class is
Most cycle-tracking apps surface the dates and skip the biology. This class is the biology. It walks through the four phases of a menstrual cycle, what is happening hormonally at each one, and which of the things you have been told about your cycle are not actually true.
Gaux built this for the trying-to-conceive stage because the gap between what a tracking app shows and what a body is doing is where most of the early frustration lives. A 28-day average is not a 28-day rule, ovulation is not always day 14, and a regular cycle is not the only normal one.
It is taught by a credentialed Gaux professional who treats cycle biology as a clinical literacy, not a fertility hack. Ten focused minutes that change the way you read every chart you look at afterward.
What you get
- A short, credentialed take on one part of the family-building road.
- Language that travels — bring it to your OB, RE, or partner without translation.
- Watch on your own time; the rest of the library opens with membership.
What you’ll learn
- The four phases of the cycle — menstrual, follicular, ovulatory, luteal — and the hormonal job each one is doing.
- Why ovulation is the anchor of the cycle, not the middle of it, and what that means for tracking.
- How to read your own basal body temperature, cervical mucus, and LH signals together instead of relying on a predicted date.
- Which app predictions are based on real biology and which are statistical averages that may not match you.
- What a normal cycle range actually looks like, and at what point variation is worth bringing to a doctor.
- How perimenopause, postpartum, breastfeeding, and stress reshape a cycle without making it broken.
- What this means for the timing window when you are actively trying to conceive.
Who it’s for
Anyone in the trying-to-conceive stage who wants to understand their cycle as biology rather than as a column in an app. Also useful for anyone whose cycle changed recently and wants to know whether the change is worth flagging.
Inside this chapter
Other lessons in Understanding your cycle & fertility — included with membership.
- 01How a menstrual cycle actually works (and what your app isn't telling you) · you’re here
- 02The four phases of your cycle — what's real vs. wellness mythology
- 03Ovulation: signs, timing, and what's a myth
- 04Cycle Tracking That Actually Works
- 05Coming off hormonal birth control — what to expect
Common questions
I have been tracking for years. Will this class still teach me something?
Most long-time trackers learn at least one thing in this class about what the app is actually estimating versus measuring. That gap is the point.
Is a 28-day cycle the only healthy one?
No. Cycle length normal ranges are wider than the apps imply, and the class covers what the real normal range looks like.
Does this class help me time intercourse for conception?
It gives you the biology. The timing piece is downstream of the biology, and it gets meaningfully easier once the phases are clear.
What if my cycle is irregular?
Irregular has many causes, some clinical and some lifestyle. The class covers what kinds of irregularity are worth a doctor visit and which kinds are usually within normal range.