Cervical mucus & fertility - everything you need to know

Cervical mucus helps you determine your fertility. The consistency of the mucus over the course of the cycle you can tell if ovulation is imminent or has already passed. The observation of the cervical mucus is quite simple and an important part of the Symptothermal Method. Here you can find out which phases the cervical mucus goes through, how it feels and looks and how you can use it to gather clues about your fertility.

  • What is cervical mucus?

    Cervical mucus is a secretion made by the glands in the cervix. It protects against pathogens and optimally prepares the climate in the vagina for fertilization. Cervical mucus changes its consistency over the course of the cycle and shows you when you are most fertile.

  • How can I see if I'm fertile by looking at the cervical mucus?

    The cervical mucus changes over the course of the cycle. In the beginning it may not appear at all, then it becomes more whitish and creamy - and the closer you get to ovulation, the thinner and more spinny the mucus becomes. This is how you can see that ovulation is getting closer. And you are only fertile around ovulation.

  • What does the cervical mucus look like when you ovulate?

    The thinner and more spinnable the cervical mucus, the closer you are to ovulation. After ovulation, the appearance of mucus changes significantly—it becomes creamier, sometimes clumpy, or disappears altogether.

  • How to correctly observe the cervical mucus?

    It is best to observe the cervical mucus daily - between your fingers or on the toilet paper. Most women can easily assign their observation to one of the categories used in symptothermal family planning.

  • How does the cervical mucus change during the menstrual cycle?

    In the course of your cycle the cervical mucus changes due to the influence of the hormones estrogen and progesterone. This makes it an important sign for your current one cycle status. He can tell you exactly where you are in the cycle. 

    The hormone estrogen is released before ovulation formed by the maturing follicles. The more estrogen is formed, the more the cervical mucus liquefies: it becomes more transparent and spinnable. The pH value of the estrogen-rich cervical mucus is basic and can therefore protect the penetrating sperm from the acidic vaginal environment. 

    The hormone progesterone is after that ovulation formed by the so-called yellow body (corpus luteum). The more progesterone is formed, the thicker and drier the cervical mucus becomes. It also no longer runs down the vagina and seals the cervix. This protects the body from the ingress of pathogens. 

Observe the cervical mucus properly!

The cervical mucus can be observed in several ways: by feeling, feeling and seeing. Since hormone levels change throughout the day, it is important to monitor cervical mucus throughout the day. To observe the cervical mucus, simply wipe the vaginal opening with your finger or toilet paper (preferably before going to the toilet so as not to be confused by the urine) and think about the following:

How does the vaginal entrance feel? Is it dry, moist or maybe even wet there? How does the cervical mucus feel? Does it feel slippery or slippery? What does the cervical mucus look like? do you see him at all What color is he?

If you use a trackle, it is important to enter your observations into the trackle app using the standardized buttons. trackle will only confirm your ovulation if a cervical mucus evaluation AND a temperature evaluation are possible. The abbreviations that the app offers you for evaluating cervical mucus can be found a little further down or here in the video:

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Phase 1: Hardly any cervical mucus

After menstruation, your vaginal entrance often feels dry, the cervical mucus only increases again. Then you might feel it as a wet feeling without you seeing it.

Phase 2: Creamy cervical mucus

When the follicle grows and spreads to the ovulation prepared, you can also tell from your cervical mucus. It is cloudy, whitish or yellowish and is thick, creamy, lumpy, sticky or chewy and not stretchy.

  • whitish, creamy

  • lumpy, thick, whitish or yellowish

  • whitish, creamy

Phase 3: Glassy cervical mucus

The closer you are to your ovulation come and become fertile, the more cervical mucus you produce and the better its quality. Better in this case means clear, glassy and transparent. Sometimes it has a slight yellow tinge or contains white streaks, it is stretchy and feels slippery and slippery. Sperm feel particularly comfortable here.

  • glassy, stretchy, stringy

  • glassy, interspersed with whitish streaks, like raw egg white

  • glassy, spinnable

Phase 4: Dryness after ovulation

After yours ovulation the cervical mucus becomes cloudy and lumpy again or disappears completely. It feels as if your vaginal entrance is completely dry again.

  • Dryness, little or no cervical mucus

What does cervical mucus have to do with natural family planning?

Observing the cervical mucus can help you with this cycle to observe. This changes in the course of your cycle due to the influence of hormones. The cervical mucus is therefore a body sign that helps you to recognize whether you can get pregnant or not.

However, research has shown that, in terms of safety, it is better to observe two body signs: the cervical mucus AND the core body temperature. Therefore, the safest method for hormone-free contraceptive control is the symptothermal method. It provides you with criteria for correctly observing and evaluating your cervical mucus and core body temperature. the Sympothermal Method helps you to recognize whether you are currently fertile or not.

What do the cervical mucus abbreviations mean?

t ("lowest" quality)

Feel: dry, dry rough, itchy, uncomfortable feeling AND

Looks: saw nothing, no cervical mucus at the vaginal entrance

Feel: felt nothing, no moisture, no sensation at the vaginal entrance AND

Looks: saw nothing, no cervical mucus at the vaginal entrance


Feel: wet BUT

Looks: saw nothing, no cervical mucus at the vaginal entrance


Feel: wet or felt nothing AND

Looks: Thick, whitish, cloudy, creamy, lumpy, yellowish, sticky, milky, not stretchable or chewy

S+ ("highest" quality)

Feel: wet or felt nothing AND

Looks: glassy, crystal clear, glassy translucent, like raw albumen (glassy interspersed with white threads), stretchy or spinnable, stringy, liquid, so thin that it "runs away like water", reddish, reddish-brown, yellowish-reddish

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