The fertile mucus ladder
As estrogen rises through your cycle, cervical mucus moves through a predictable progression: dry → sticky → creamy → watery → egg-white. Egg-white stretchy mucus is your peak fertility sign - sperm survives best in it. After ovulation, progesterone reverses the trend and mucus turns sticky and thick again.
Combine signals for accuracy
Cervical mucus + BBT + ovulation predictor kits is the most accurate combination for predicting ovulation. For a date-based estimate, use the ovulation calculator or the fertile window calculator.
Frequently asked questions
How does cervical mucus change across the cycle?
Right after your period: dry days. Then sticky, then creamy, then watery, then peak egg-white stretchy mucus right around ovulation - the most fertile sign. After ovulation, progesterone makes mucus thick and sticky again until the next period.
What if I never see egg-white mucus?
Some people never see classic egg-white mucus - it can be very subtle. Tracking what you do see across 2-3 cycles usually reveals a personal pattern. If you're trying to conceive and never see fertile-quality mucus, mention it to a doctor; underlying causes range from cervical issues to hormonal.
How do I check cervical mucus?
Wipe with toilet paper before going to the bathroom, or check with clean fingers at the vaginal opening. Notice the color, how it stretches between fingers, and how it feels. Check at the same time of day if you can.
These calculators give estimates based on cycle averages and standard formulas. They are for general information only and are not medical advice. For anything concerning your health or pregnancy, talk to a qualified healthcare provider.