Cervix

The cervix is the sheath of tissue that acts as a barrier between the uterus and vagina. During a woman’s monthly cycle, the cervix rotates, opens, and closes in conjunction with phases of menstruation, ovulation, and non-fertility. These rotations can be used to track a woman’s fertility window.

The cervix is also responsible for the creation of cervical mucus, or vaginal discharge, which can aid in the health of the vagina and transmission of sperm into the uterus. Certain conditions of the cervix may complicate or impede pregnancy.