The cervix must be 100% effaced and 10 cm dilated before a vaginal delivery.
If your water (aka “amniotic sac,” “bag of waters” or “membranes”) hasn't broken on its own when you arrive at the hospital, and you're five or more centimeters dilated, your OB might recommend bursting the bag by hand—especially if your cervix seems to be making slow (or no) progress.
Rupturing or breaking your amniotic sac can cause your uterus to contract and help dilate your cervix.
Your water usually breaks when you have reached week 39 of your pregnancy. It often occurs after labor begins, but it can also happen before. The amniotic fluid should be clear and odorless. If your water breaks, you should call your healthcare provider immediately.
As your baby's birthday gets close, your cervix begins to dilate, or open up. Dilation is checked during a pelvic exam. Typically, if you're four centimeters dilated, you're in the active stage of labor. If you're fully dilated, you're ready to start pushing.
What to Expect When You Arrive. When you arrive, we will evaluate you and your baby to check for labor progression. If you're less than 4 cm dilated: You might be sent home because your labor isn't active enough for hospital admission.
When your baby is ready to begin the journey through the birth canal, your cervix dilates from fully closed to 10 centimeters. This process can take hours, days, or even weeks. But once you hit active labor – about 6 cm dilated – it's usually just a matter of hours before you reach full dilation.
Usually the bag of waters breaks just before you go into labor or during the early part of labor. It happens often when you are in bed sleeping. You may wake up and think you have wet the bed. Sometimes women feel or even hear a small “pop” when the bag breaks.
Getting up and moving around may help speed dilation by increasing blood flow. Walking around the room, doing simple movements in bed or chair, or even changing positions may encourage dilation. This is because the weight of the baby applies pressure to the cervix.
Does it hurt when my waters break? No, it shouldn't hurt when your waters break or when they are broken for you. The amniotic sac, which is the part that 'breaks' doesn't have pain receptors, which are the things that cause you to feel pain.
Typically, after your water breaks at term, labor soon follows — if it hasn't already begun. Sometimes, however, labor doesn't start. If you experience prelabor rupture of membranes, your doctor might stimulate uterine contractions before labor begins on its own (labor induction).
Generally, it can occur naturally just before or during labor, or it can be induced by a doctor. To induce a water breaking, the pregnancy must reach full term, and the mother must be at least 5 cm dilated. Dilation is the process of the cervix opening in preparation for childbirth.
The cervix generally needs to be dilated to 10 centimeters before it's ready for the baby to pass through. Your cervix can be dilated to a couple of centimeters for a few weeks before delivery. This softening can cause the mucus plug to be dislodged and come out.
In most cases, however, an epidural will not be given until the mother is at least 3-4 centimeters dilated. Once the mother is fully dilated most doctors and hospitals will consider it too late for an epidural to be given.
If your cervix has opened up to at least 2-3 centimetres dilated and the baby's head is well engaged (low down in your pelvis), your waters will be broken (see below under Artifical Rupture of Membranes). If it is not possible to break your waters a second Propess pessary may be inserted if appropriate.
One way in which you can help your water to break in the last days of pregnancy is to walk. Walking is not only great exercise, but it helps your little one drop into the birth canal in order to get ready for delivery. This in itself can help your water break and bring the onset of contractions.
Sometimes, water breaks while you're sleeping. If you're concerned about flooding the bed, consider protecting your mattress with a waterproof cover.
What are the signs that your water is going to break? There are no signs that your water is going to break; however, most people will be in labor and have contractions before their water breaks. So, if you're in labor and experiencing contractions, your water can break at any moment.
Early dilation often feels like menstrual cramps as the cervical changes cause pain and cramping noticed in the lower part of the uterus. It is the same sensation and location as menstrual cramps. Active labor tends to be felt in a larger area but can be a similar sensation as cramping (with more intensity of course).
You may be admitted to the hospital if your cervix is dilated past six centimeters, your water is broken, or you have special circumstances (as determined by your healthcare provider or midwife).
Your cervix needs to open about 10cm for your baby to pass through it. This is what's called being fully dilated. In a 1st pregnancy, the time from the start of established labour to being fully dilated is usually 8 to 18 hours. It's often quicker (around 5 to 12 hours), in a 2nd or 3rd pregnancy.