Why and when?
The state of pregnancy for obstetrician-gynecologists is associated with a certain terminology, not characteristic of other diseases and gynecological abnormalities. One of these terms "chorion" is used by doctors to refer to the placenta in the I trimester of pregnancy. Therefore, in the cards of patients at an early date, there may appear a "chorion presentation" notes. An unknown expression combined with the word "diagnosis" can alert a future mother. Do not be frightened, but it's better to take yourself for a habit of asking the doctor in detail about everything that is not clear and suspicious. Do not be afraid to ask again or clarify, because in this situation about the shyness in the doctor's office should be forgotten.
So, this diagnosis in the medical language means misplacing the placenta. That is, a situation where the placenta does not attach to the body of the uterus, but captures the lower segment of the uterus. Sometimes there is a partial or complete overlapping of the internal throat of the cervical canal. The presentation of the chorion is most relevant for the first trimester of pregnancy, and with the development of the fetus the chorion rises. But sometimes this does not happen.
Types of presentation
Low presentation refers to the attachment of a fetal egg below the cervix by several centimeters. According to statistics, this presentation occurs in 5% of pregnant women, and this diagnosis can be made only during ultrasound. In case of low presentation, there is every chance of normalizing the situation. So, in 90% of cases the chorion rises to the desired position with an increase in the size of the fetus. Promotes this by pulling up the tissues of the uterus, behind which stretches and the placenta. That is, in this situation everything comes back to normal without any medication.
There is also a presentation on the back of the uterus. This option is very common and normal. The placenta can pass to the side walls of the uterus, and this is also not a cause for concern. In the case of presentation on the front wall, the migration of the placenta occurs even faster - and this is the norm.
Sometimes it happens that the placenta has not risen. At the same time overlapping of the internal throat is not observed. Then the pregnant woman is recommended full rest and supervision at the gynecologist.
If the presentation is partial, the placenta can block even 2/3 of the cervix. One of the varieties of this type is marginal previa. At it the overlapping of an aperture of a uterus makes no more than 1/3. These options are a bit more alarming, but it's not worth talking about hopelessness of the situation. The risk of miscarriage rises, bleeding may begin.
The most threatening doctors are the full or central placenta previa. In such a situation, complete overlapping of the internal pharynx of the cervical canal is observed. At the central presentation, a woman is shown hospitalization, because there is a risk of heavy bleeding. To avoid it, the pregnant woman should be under the constant supervision of a doctor. Although a full presentation is often associated with a cesarean section, there are chances of maintaining a pregnancy. A favorable outcome is observed in 95% of cases.
Reasons for the presentation of the chorion
The main cause of such a violation of pregnancy is the pathology of the inner walls of the uterus. A consequence of this is the difficulty in attaching the embryo to the uterus. This pathology occurs after an abortion, can be the result of infections or uterine deformities. The risk group also includes women with severe forms of heart disease, kidney or liver, because these diseases cause stagnation in the uterus. It should be noted that the presentation of the chorion is more often affected by "geeks" and women older than 35 years.
Consequences of chorion presentation
The most common complication of chorion presentation is bleeding. Its abundance depends on the degree of presentation. During the full presentation, bleeding can happen as early as 2-3 months, lateral can cause bleeding after 6 months, during childbirth.
The outflow of blood goes out. Thus, it is possible to avoid the appearance of bruising between the uterus and chorion, but the risk to the mother and child does not decrease.
The peculiarity of such bleeding is suddenness, but in the pregnant woman at that time pain sensations are not observed. Such a distinctive feature allows not to confuse bleeding with miscarriage.
Against the background of the presentation, the embryo often finds itself in a transverse or gluteal position. Then it is recommended to do caesarean section to avoid all risks.
Future moms should remember that the presentation of the chorion is not a verdict. Observing the advice of a doctor, you can endure and give birth to a healthy child. Believe that it will be so!