Features cervical dilatation process

onset of labor is the appearance of regular contractions, which begins under the influence of cervical dilatation.Also, this process contributes to the pressure and weight of the membranes.Gradual expansion continued for 8-14 hours and ends amniorrhea and full disclosure.Then the expulsion of the fetus directly.

How is cervical dilatation

woman's uterus is a hollow organ composed of muscle tissue.Around the throat is a ring of muscle - the cervix.Throughout pregnancy, it is closed.The entrance is protected by a mucous plug, which is a barrier for the penetration infections.The cervix is ​​quite dense, takes the form cylinder 3 cm in width and about the same length.In the center of the cervical canal passes.After 32-34 weeks of pregnancy occurs gradually cervical dilatation, softening it.

For internal inspection of cervix misses fingertip.The fruit begins to descend in the pelvis, thereby creating a certain pressure on the cervix, which contributes to its further disclosure.By 36-38 weeks the cervix

is ​​fully mitigated.It starts with the expansion of the internal os, which in nulliparous has a funnel shape with the base facing upward.Gradually moving forward, the fetus stretches the outer mouth.In multiparous women cervix is ​​easier, and the inner and outer jaws expand almost simultaneously.

With each contraction under the influence of hormones occurs first cervical dilatation on a finger, then two.At the time of delivery of the full expansion of 10 centimeters in diameter.With this degree of disclosure of the head and torso of a baby can pass through the birth canal.

total in the first stage of labor divided into three phases:

  • latent phase begins with regular contractions rate of one or two in ten minutes.At this time there is a shortening of the cervix, and anti-aliasing.The duration of this phase is on average 4-6 hours.Contractions during this period, as a rule, maloboleznennye;
  • active phase is characterized by intensification of labor.Increasing intensity of contractions, which are becoming more frequent, severe and painful.Disclosure of the cervix with two fingers increases to about 8 centimeters.The duration of this period - from 4 to 6 hours;
  • transitional phase begins when the cervix is ​​almost fully opened, and the intensity of labor is more often than once in seven minutes.After that comes a weakening of labor.Phase duration is from 20 minutes to 1-2 hours multiparous it may be omitted.

Also during the active phase usually occurs rupture of membranes by increasing intrauterine pressure.The liquid volume of about 150-200 ml.In a normal amniotic fluid should be clear and bright.If cervical dilatation of 6-8 centimeters of water not recovered spontaneously, it is usually the obstetrician makes amniotomy - opening membranes.

If the cervix is ​​not disclosed

Throughout the first stage of labor is carried out constant monitoring of the condition of the mother and fetus.Keep an eye on the progress of labor, lack of complications, well-being pregnant (heart rate, blood pressure, discharge from the genital tract, temperature), cervical dilatation.

for timely diagnosis of fetal hypoxia during labor and the prevention of possible fetal death is held constant kardiomonitorny control.The most commonly used indirect cardiotocography, where the frequency of the heart rate is measured by means of ultrasound.

The fact that the birth canal of women prepared indicates cervical dilatation on the finger and more.It determined by this manual method, which is called an internal examination.His conduct in the sterile gloves, and entrance to the vagina is treated with a disinfectant solution.The midwife may thus determine the readiness of the cervix, a condition of amniotic fluid, the baby's position and height of the head state.

If the cervix is ​​not disclosed, and the woman approached term births, in this case do stimulation.Also it is usually carried out after 40 weeks of pregnancy, the placenta is aging and can not fully carry out its functions.Artificial preparation os carried out in two ways: medication and non-drug.

first method is used only in a hospital, with the cervix is ​​carried out with the help of medicines:

  • Introduction to the cervical canal laminaria sticks to its full length.Under the influence of moisture in about 4-5 hours rods begin to swell, thereby expanding the opening.In addition, kelp secrete endogenous prostaglandins, which promote cervical ripening, thereby preparing them for childbirth;
  • Application of artificial prostaglandin as a suppository or gel.This allows you to have a few hours to achieve the desired result;
  • also cervix accelerated after piercing the membranes.As a result, the fetal head descends, thereby increasing pressure on the channel.

Drug-free methods can be used alone, but be very careful:

  • cleansing enema causes the back wall of the uterus stimulation, contributing to its reduction.It also helps the rapid discharge of mucus plug, accelerating during childbirth.Make it should be only for those women who have already come estimated date of delivery, that is, full-term baby;
  • sex is also a stimulant for the dilation of the cervix at 2 fingers and more.The fact that prostaglandins are contained in the sperm, which consists of the materials used in a hospital to accelerate labor.However, if the mucus plug has moved away, then this method is not recommended, so as not to bring an infection in the uterus;
  • Exercise (washing floors, cleaning the house, walking up and down the stairs) - another way to better prepare the cervix for childbirth.But it is important not to overdo it, especially if a history of hypertension, preeclampsia or placenta previa.

In some cases requires hospitalization of women in pre-hospital to prepare for the upcoming birth.Doctors hold it in-depth laboratory, clinical and instrumental examination to select the timing and delivery methods.

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