About the Cervix:
The cervix looks like a cute little donut that connects the uterus to the vagina. During menstruation, the cervix opens to allow blood to pass from the uterus to the vagina. During ovulation, the cervix opens slightly, allowing sperm — if any are around — through to the uterus. And during childbirth, the cervix opens super-duper wide to let a whole baby go from the uterus through the vagina and out into the world. Wow!