🔬 Cervical Mucus Checker
Identify your cervical mucus type and assess your fertility status using the Billings Ovulation Method. Select the mucus type you're observing to get detailed characteristics, fertility rating, cycle context, and personalised guidance.
What Is Cervical Mucus?
Cervical mucus is a fluid produced by the cervix that changes in texture, volume, and colour throughout the menstrual cycle. These changes are driven by the hormones estrogen (before ovulation) and progesterone (after ovulation).
Cervical mucus serves two key functions:
- Fertility support: Around ovulation, the mucus becomes thin, clear, and stretchy — creating a pathway that helps sperm swim through the cervix to reach the egg.
- Protection: At other times, the mucus is thick and sticky, forming a barrier that prevents bacteria and other substances from entering the uterus.
The Four Types of Cervical Mucus
The Billings Ovulation Method classifies cervical mucus into four types based on appearance and sensation:
- Type 1 — Dry/None: Nothing seen or felt. Low fertility. Common after menstruation and after ovulation.
- Type 2 — Sticky: Thick, paste-like, white or yellow. Low fertility. Breaks when stretched.
- Type 3 — Creamy: Smooth, white, lotion-like. Intermediate fertility. Indicates rising estrogen.
- Type 4 — Egg White: Clear, stretchy, slippery — like raw egg whites. Peak fertility. Signals impending ovulation.
How to Check Cervical Mucus
To monitor your cervical mucus:
- Observe appearance: Check toilet tissue after wiping or underwear for colour and texture.
- Note sensation: Pay attention to how the vulva feels — dry, damp, wet, or slippery.
- Finger test: Gently remove a sample and observe it between your fingers. Note colour, consistency, and stretchability (spinnbarkeit).
- Record daily: If multiple types are observed, record the most fertile type.
The Billings Ovulation Method
The Billings Ovulation Method (BOM) is a natural family planning method that relies on daily observations of cervical mucus at the vulva. Key concepts:
- Basic Infertile Pattern (BIP): A consistent pattern of dryness or unchanging non-slippery mucus.
- Peak Day: The last day of slippery sensation. Ovulation occurs within 24 hours after the peak.
- Fertile window: From the first sign of change from the BIP until 3 days after the peak day.
Why Use This Checker?
- Instant classification: Identify your mucus type and fertility level.
- Billings Method alignment: Based on the established Billings Ovulation Method framework.
- Detailed characteristics: Colour, consistency, sensation, and stretchability for each type.
- Personalised context: Cycle day and regularity analysis (optional).
- Free & private: No registration, no data storage — all calculations are done in your browser.
❓ Cervical Mucus Checker FAQ
What are the four types of cervical mucus?
The four types are: Dry/None (low fertility), Sticky (low fertility), Creamy (intermediate fertility), and Egg White (peak fertility). Each type corresponds to a different stage of the menstrual cycle and hormone levels.
What does egg white cervical mucus mean?
Egg white cervical mucus (EWCM) is clear, stretchy, and slippery — resembling raw egg whites. It indicates peak fertility and signals that ovulation is imminent. This type of mucus helps sperm swim through the cervix to reach the egg.
How do I check my cervical mucus?
You can check by observing toilet tissue after wiping, noting the sensation at the vulva, or using your fingers to collect a sample and observe its consistency, colour, and stretchability. Record the most fertile type observed each day.
What is the Billings Ovulation Method?
The Billings Ovulation Method is a natural family planning method that tracks cervical mucus changes at the vulva to identify fertile and infertile days. It focuses on the sensation of the mucus — dry, damp, wet, or slippery — as well as its appearance.
What is the peak day?
The peak day is the last day of slippery sensation at the vulva. Ovulation typically occurs within 24 hours after the peak day. After the peak, the fertile window continues for 3 more days.
How long does egg white cervical mucus last?
Egg white cervical mucus typically lasts for 3 to 4 days around ovulation. In a 28-day cycle, it usually appears between days 10 and 14.
What if I don't notice any cervical mucus?
Some people naturally produce less noticeable mucus. If you consistently notice no mucus, it may be due to hormonal imbalances, medications (like antihistamines), dehydration, or other factors. Consult a healthcare provider if concerned.
Can I use this checker to avoid pregnancy?
No. This checker is an educational tool and should not be used as a standalone contraceptive method. The Billings Method requires training with an accredited instructor for effective use. Consult a healthcare provider for family planning guidance.
How accurate is the fertility rating?
The fertility rating is based on the Billings Ovulation Method classification and established research on cervical mucus and fertility. However, individual cycles vary. For greater accuracy, combine with basal body temperature tracking and ovulation predictor kits.
Is this checker free?
Yes, this checker is completely free to use. No registration or personal data storage is required. All analysis is performed in your browser.