The cervix is the lower part of the uterus that opens into the vagina. It works like a very smart "gatekeeper"! It changes position and texture throughout the month and produces cervical mucus, which helps or hinders the passage of things into the uterus. Knowing your cervix is an advanced level of self-knowledge. It is firm like the tip of your nose in some phases and soft like your lips in others. Amazing, right?