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. It usually starts off at 1 cm and can take several days or weeks to reach 5 cm.
(Some OBs will go ahead and break your water at 3 or 4 centimeters.) The reasoning behind this: “Artificial rupture of membranes” (popping a hole in the amniotic sac) will usually jumpstart labor by getting serious contractions underway.
If you're more than 4 cm dilated: You'll be admitted to the hospital to continue your labor and delivery.
In this phase, your cervix will finish effacing and dilate to the full 10 centimeters. This phase may take anywhere from 10 minutes to two hours.
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.
Active Labor
This phase typically lasts from three to five hours and continues from the time your cervix is 3 cm until it is dilated to 7 cm. True labor produces signs you don't want to ignore. Your contractions will last about 45 seconds to a minute and allow you only three to five minutes in between.
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.
But if you're close to 10 centimeters dilated the research suggests it's not an issue. Evidence suggests it's more of a theoretical fear that just adds additional stress and in some cases results in an epidural (or a higher dose of epidural) to mask that urge.
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.
Although it is the shortest phase, the transition phase is the most challenging. Transition typically lasts 30 minutes to 2 hours as your cervix fully dilates from 8 cm to 10 cm. Contractions will last roughly 60-90 seconds with only 30 seconds to 2 minutes between.
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.
If you are less than 4 cm dilated and your labor isn't active enough for hospital admission, you might be sent home.
The advantages of having your water intentionally broken are: It can speed up or progress your labor by bringing your baby down closer to your cervix and increasing contractions. It can help your healthcare provider monitor your baby more closely for distress.
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.
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.
Layers of tissue called the amniotic sac hold the fluid that surround a baby in the womb. In most cases, these membranes rupture during labor or within 24 hours before starting labor. Premature rupture of the membranes (PROM) is said to occur when the membranes break before the 37th week of pregnancy.
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.
Until recently, women have been asked to start pushing as soon as the cervix has dilated to 10 centimeters, but as long as you do not have a fever and your baby's heart rate is normal, there are many benefits to waiting to push until you feel the need to push.
The second, pushing phase of labor continues after the cervix is fully dilated (open) to 10 cm until the delivery of your baby. It averages 4 to 8 hours but can be as short as several minutes.
It is not uncommon for the cervical ripening to take up to 24-36 hours!! It is also not uncommon to use different techniques to ripen the cervix. You may feel contractions during this process. If the contractions become painful, you will be able to request medication to relieve your discomfort.