what is cervical mucus?
cervical mucus is a fluid produced by glands in the cervix, the lower part of the womb that opens into the vagina. its texture and amount change throughout the menstrual cycle in response to shifting hormone levels, particularly oestrogen and progesterone, which is why many people use it as a sign to help understand where they are in their cycle.
why it changes across the cycle
cervical mucus exists partly to help or hinder the journey of sperm through the reproductive tract, depending on the point in the cycle. around ovulation, when the body is most fertile, mucus typically becomes more plentiful, clearer and stretchier, making it easier for sperm to travel. at other points in the cycle, when pregnancy is less likely, mucus tends to be thicker, less abundant, or less noticeable.
the general pattern through the cycle
- just after a period: many people notice little to no noticeable mucus, sometimes described as a "dry" phase, though this varies between individuals.
- as the follicular phase progresses: mucus often becomes more noticeable, and may feel sticky or slightly cloudy.
- approaching ovulation: mucus commonly becomes clearer, wetter and stretchy, often compared to raw egg white. this is generally considered the most fertile type of mucus.
- after ovulation: under the influence of progesterone, mucus typically becomes thicker, stickier or less noticeable again, and often stays this way until the next period.
how people use this information
observing cervical mucus is one method some people use as part of understanding their fertility signs, whether for trying to conceive, avoiding pregnancy, or simply becoming more familiar with their own cycle. it is often used alongside other signs, such as basal body temperature, for a fuller picture, since no single sign is perfectly reliable on its own.
normal variation
the exact pattern, amount and texture of cervical mucus varies between individuals, and can also be affected by factors such as hydration, certain medications, hormonal contraception, breastfeeding, and stages of life such as perimenopause. this means comparing your own pattern with someone else's is not always meaningful, and getting to know your own typical pattern over time is more useful.
when to seek advice
occasional changes in cervical mucus are normal, but it is worth speaking with a healthcare professional if you notice a strong odour, unusual colour such as green or grey, itching, irritation, or discomfort, as these can sometimes indicate an infection or other condition that benefits from proper assessment rather than guesswork.