Here’s a demo of what your cervix does in labor and childbirth! Now the cervical dilation numbers and the stages they coincide with might vary and some people feel transition earlier than 8cm dilated. And some people are actively contracting and changing their cervix before 6cm dilated. But your cervix will dilate from closed, not open to 10cm or fully dilated and it will also thin, or efface! Stages of labor are really neat and when you see your cervix on your baby’s head it looks even neater!