It is known as effacement. Usually occurs before dilation in first time mom's and after dilation is subsequent pregnancies. Labor doesn't usually occur until after 100% effacement and 10 cm dilation. If labor does occur and the cervix is not 100% effaced and dilated, then a C-section is a probability.
Effacement.
Engagement.
No, once you have dialated your cervix will not close.
Effacement
Effacement.
When a woman is approaching labor, the cervix begins to thin and shorten. (think of a polo neck jumper becoming a crew neck jumper). Before labor, the cervix is around 2 to 3 cm in length. The shortening and thinning is known as effacement. Dilation (opening) of the cervix may occur at the same time - particularly in first time moms.
2.54 cm = 1.0 inch
The process of cervical dilation typically occurs during labor when the uterine contractions push the baby down the birth canal, causing the cervix to thin and open up. It is a natural and involuntary process that primarily depends on hormonal changes and the body's readiness for childbirth. Specific medical interventions, such as medications or procedures, may be used to help facilitate cervical dilation if necessary.
The first stage of the birthing process is the onset of labor, which involves regular contractions of the uterus that help to dilate the cervix.
10 cm dilatation.
Cervical manipulation.