The placenta is an important organ that forms and develops only during pregnancy. The placenta is a kind of connecting element between mother and baby. Through this important organ, the child receives oxygen and nutrients. The baby receives antibodies, as well as hormones that are responsible for the safety of pregnancy and the normal development of an unborn child.
The formation of the placenta begins one week after fertilization, and after giving birth within half an hour, it leaves the uterus, fulfilling all its functions.
Many pregnant women are interested in the question of the correct location of this body. The placenta is usually located on the front wall or back, closer to the bottom of the uterus. Such an arrangement ensures the safety of this body and the performance of the necessary function by it.
The location of the placenta depends on where the fertilized egg is attached after conception. To know the placenta can be by ultrasound.
The position of the placenta in the uterus may be:
- placenta on the front wall,
- placenta on the back wall,
- placenta in the area of the uterus,
- Placenta in the side wall area.
All of the above items are the norm and do not pose any threat to both the mother and the fetus.
The placenta on the front wall can pose a threat only in case of operative delivery (cesarean section). This is due to the increased risk of possible bleeding. The placenta on the front wall of the uterus may be located exactly in the place where the doctor needs to make an incision to remove the baby.
If you have a caesarean section, and you have an anterior placentation, do not worry in advance. Surgeons will take all necessary measures to reduce the risk, and in the case of bleeding can quickly stop it.
In some cases, anomalous (incorrect) attachment of the placenta is possible.
A low position of the placenta is a pathology in which the ligament between the mother and the fetus is located at a level of six centimeters or less from the internal shed of the cervix. It does not matter where the placenta is: on the front wall, on the side or on the back. Plays a role distance to the cervix. In most cases, the low location of the placenta does not pose a threat, as with the growth of the abdomen it moves higher to the bottom of the uterus.
Placenta previa is the location at which the internal pharynx overlaps (partially or completely). There are three types of presentation: edge, side and full.
When the regional previa placenta overlaps the inner surface of the cervix is not more than one-third, with lateral previa - two-thirds, and with full - completely. It does not matter whether the placenta is located on the front wall of the uterus, on the side or back.
Among the complications that are present in such a diagnosis as presentation, we can single out the most formidable ones: placental insufficiency, which leads to a delay in intrauterine development, the risk of bleeding, especially at 28–32 weeks, when the activity of the uterus increases, the threat of pregnancy failure. Often when the placenta previa there is an abnormal (transverse, oblique) position of the fetus in the uterus.
With full previa, a scheduled caesarean section is performed at 38 weeks gestation. If there is a marginal or lateral presentation, the pregnant woman can give birth on her own, if such a decision is made by the doctor after the examination. In this case, with independent deliveries, an opening of the fetal bladder is shown at an early period, as well as full readiness of the operating room in case of unforeseen circumstances.
If the placenta is located on the front wall of the uterus, lateral or posterior, closer to the bottom of the uterus, this is normal. Such a pregnant woman can independently bear and give birth to a child. If you have a low position of the placenta or its presentation, you need constant monitoring and observation by the attending physician who can make an adequate decision on the issue of delivery.
How does this happen
After fertilization, the egg enters the uterus and is embedded in its wall. At the same time, she chooses a place where the mucous membrane is as thick as possible, with a large number of blood vessels, which can provide the best conditions for further growth and development of the unborn child. The placenta will be formed at the site of the insertion of the ovum into the uterus wall by 7-8 weeks of gestation.
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How should it be located?
For the correct growth and development of the baby, it is important that the placenta is properly formed. Its location is an important factor in the proper course of pregnancy.
Ideally, the placenta should be attached to the back of the uterus, in its upper part and closer to the bottom. Indeed, to the best of the growth of the fetus, the walls of the uterus are greatly stretched. But not evenly, but more on the front wall. It is significantly thinned. The back wall at the same time remains dense and less subject to stretching.
Therefore, attachment of the embryo to the back wall is considered natural and normal, because the placenta does not have stretching properties. That is, the placenta on the back wall is less susceptible to loads that burden it. This means that it is ideal to attach the fetus to the back wall and placenta development.
Options for placement of the placenta can be different: lateral mounting (right or left of the back wall), on the front wall of the uterus. The last option is the most dangerous. After all, the placenta on the front wall is subjected to heavy loads due to the stretching of the uterus, the activity of the fetus and mother. This is the risk of damage to the placenta or its premature detachment. Also, the placenta can descend close to the uterine throat, and can block access to the birth canal.
Causes of anterior previa
Why there is placenta previa on the front wall? The reasons for this are not fully understood. One of the main ones is damage to the endometrium (the inner layer of the uterus). That is, the consequences of inflammation, scraping, scars from operations. The cause of placenta previa on the front wall may be uterine fibroids, its other pathologies. By the way, this pathology is found much more rarely in primiparous women than in the second, third genera. Gynecologists explain this condition of the inner lining of the uterus.