Question: how many centimeters is your cervix?
Answer: In a normal, nonlaboring woman the cervix is 3-4 centimeters long, which is 0% effacement. If a woman is in labor, then the cervix thins. As it thins, it starts to stretch and becomes incorporated into the lower part of the uterus. For example, if the doctor determines the cervix is about 2 cm.