The Cervical Mucus Method is a natural family planning technique that involves observing changes in cervical mucus to determine fertile and infertile days in a menstrual cycle. As ovulation approaches, the mucus becomes clearer, stretchier, and more abundant, indicating higher fertility. By tracking these changes daily, individuals can identify their most fertile days for conception or avoid unplanned pregnancy. This method requires careful observation and consistency, making it essential for users to understand their own body's signals and patterns throughout the cycle.