In the course of pregnancy and birth is influenced by many factors. These include not only the behavior of the pregnant woman, but her disease before pregnancy and during it. From this it depends on the location of such an important organ of pregnancy, the placenta. Where should be located placenta is normal, and why the process is sometimes disturbed, such questions often asked pregnant women.
What is the placenta?
The placenta or afterbirth - an important organ of pregnancy, which has many functions. Through the placenta the child not only breathes and receives nutrients, but it still provides its antibody
Antibodies - "soldiers' immunity
from my mother, and produces hormones that preserve the pregnancy and to ensure normal growth and development of the baby.
Types of location of the placenta
Normally, the placenta is located closer to the bottom of the uterus on the front or back wall thereof. This localization is convenient because in this location the placenta is in the "Safety" and better carry out their functions. However, the placenta is "do not like" attached to the pathological areas (eg, in the area of the scar on the uterus or the location of the fibroids). Because the placenta, if certain pathologies of the uterus, are not always located in the bottom of the uterus. Cases and its abnormal position. These include low attachment of the placenta and its presentation.
The low placenta and placenta previa
The low placenta (low placentation) - This attachment of the placenta at or below six centimeters from the internal cervical os. Usually detected only in the US and is not fraught with any danger. Normally, due to the "migration" of the placenta rises above the end of pregnancy.
Placenta previa - it is terrible diagnosis, and can be of three types: edge, side and full.
About marginal previa say when the placenta is no more than a third, covers the internal os. In a side previa overlapping internal os reaches two-thirds. At full well, or the central previa, the placenta completely covers the cervical canal lumen.
The clinical picture of placenta previa
The most dangerous symptom of placenta previa - the bleeding. It usually begins suddenly, for no apparent reason and may be of varying intensity. But bleeding can contribute to factors such as physical activity, coughing, constipation, taking a bath and even a nervous stress. Bleeding is unpredictable, it can begin with light spotting, and then suddenly go into abundant, and even profuse. Usually bleeding starts with placenta previa in second trimester of pregnancy, but particularly dangerous time - it is 28-32 weeks. In this period there is a preparatory activity of the uterus, that is, increases its tone, resulting in premature detachment of placenta previa and bleeding.
Often accompanied by a permanent placenta previa (often repetitive) threatened miscarriage. As a consequence of persistent bleeding, anemia occurs and hypotension (low blood pressure) pregnant. This is accompanied by weakness, lethargy, fatigue and changes in skin, hair and nails.
Due to improper location of the placenta and its supplementary anemia
Anemia - when you do not have enough blood
It develops fetoplacental insufficiency
Placental insufficiency - deviation from the norm
Later turning into vnuriutrobnoy syndrome, fetal growth retardation.
Often with placenta previa malposition (lateral or oblique).
Fault location of the placenta
Very good location of the placenta determined by ultrasound. Today it is the easiest and safest method for the determination of placenta previa. However, in an emergency, such as bleeding when there is no time or opportunity to conduct ultrasound is performed examination of the cervix in the mirror in order to detect the site of the placenta in the cervical canal
Cervical canal - the path traversed by every person
. It is important that the examination is carried out very carefully, only in the maternity hospital and the presence of "expanded" operating.
Delivery with placenta previa
Thus, pregnancy full previa rodorazreshaetsya only by Caesarean section. If there are no complications, elective surgery is carried out in 38 weeks.
Pregnant women with a side or edge previa may "let" in the independent delivery, in the absence or minor bleeding, with the early opening of membranes and open operating.