Cervical mucus is a fluid produced by the cervix, the lower part of the uterus. Its consistency and amount change throughout the menstrual cycle, influenced by hormones. This mucus plays a crucial role in fertility, helping sperm travel through the reproductive tract during ovulation. During the menstrual cycle, cervical mucus can vary from thick and sticky to thin and slippery. Around ovulation, it becomes more abundant and stretchy, resembling raw egg whites. This change signals the most fertile time for conception, as the mucus facilitates sperm movement and protects them from the acidic environment of the vagina.