Start after your period ends, check throughout the day (especially after using the bathroom) on white toilet paper, test the stretch between two fingers and record what you see once a day, always at the same time. Then compare with the day before: what matters is the change, not the absolute state.
Each time, there are two things to note: how it feels at the vulva (dry or wet) and how the secretion looks and behaves on the paper and between your fingers. Those are exactly the features that tell the five types apart, from dry to egg white.
Don't expect full precision right away. The first 2 to 3 cycles are for learning your body: every woman has her own variations, including the exact duration of her fertile mucus. From the 4th cycle on, you have a base for much more accurate personal predictions.
One day on its own says little. The useful information is the direction: mucus that gets wetter, clearer, more slippery and more stretchy from one day to the next means the fertile window is opening. When watery or egg-white mucus appears, that is your cue to start having sex; when it turns dry or sticky again, the window is closing.
Ovulation generally happens on the last day of egg-white mucus, and you can only confirm that looking back. Without a daily record, there is nothing to look back at.
| It is fertile mucus | It isn't (watch out) |
|---|---|
| Clear | Residual semen (after sex) |
| Stretchy (it stretches) | Arousal lubrication |
| Slippery | Yellow or green discharge (infection) |
| A “raw egg” sensation | Mucus with blood (spotting) |
To tell it apart from semen or sexual lubrication: check in the morning, before any sexual activity. To tell it apart from infection: fertile mucus is odorless and doesn't cause itching or burning.
Observing mucus is a core skill in Chapter 15 of Map to the Positive, in Station II (Attunement). Next to the routine, the chapter explains the five types of mucus, the “drying up” rule for timing sex, and the common causes when fertile mucus doesn't show up. Station II then adds basal temperature, ovulation tests and secondary signs, and shows how to combine everything into your personal map.
Take 30 days. If it does not give you more clarity than everything you have read for free so far, ask for a refund and you get every cent back. We cannot promise you a pregnancy. We can promise you will not be guessing.
References: Bigelow JL et al. Mucus observations in the fertile window: a better predictor of conception than timing of intercourse. Human Reproduction, 2004. · Billings Method Atlas, the classic reference on cervical observation.