Learning how to categorise your cervical mucus (also known as cervical fluid) can sometimes feel daunting – for many of us it’s a very new concept!

Thankfully, research shows that accurate mucus charting is achievable for a majority of charters. For example, a study by the World Health Organisation found that 93% of people who learn with an instructor can identify an ovulatory pattern of mucus in their very first cycle of learning¹.

It can be really helpful to look at photos to familiarise yourself with different types of cervical mucus. Below you will find images of both ‘non-peak’ and ‘peak-type’ cervical mucus.

Remember, ALL cervical mucus (regardless of whether it is non-peak or peak-type) is considered fertile prior to confirming ovulation.

When observing and charting your cervical mucus, remember the acronym “CATS”:

• Colour
• Amount (on a scale of 1-3)
• Texture (in your own words)
• Sensation (at the vulva, while walking around during the day)

If your cervical mucus meets ANY of the below criteria (even just a single one!), it is categorised as “peak type cervical mucus”:

1. Clear, or partially clear
2. Tinged with any blood (whether fresh red or old brown)
3. Stretching 1 inch or more
4. Causing a wet or slippery sensation at your vulva as you walk around throughout the day

If cervical mucus does not meet a single one of the above criteria, only then is it considered to be “non peak type cervical mucus”.

To categorise your cervical mucus safely and accurately, join Cycle School or the Chart to Conceive online course.

Below is an example of how cervical mucus might change throughout your menstrual cycle under the influence of oestrogen and progesterone. Keep in mind that this is a textbook cycle – most charters will discover they have their own unique patterns. I work closely with my clients to help them accurately chart their own unique cervical mucus secretions.