Amniotic fluid are the habitat of the fetus from the moment of implantation of a fertilized egg in the lining of the uterus until birth.Amniotic fluid protects the fetus from mechanical damage, are involved in the metabolism Metabolism: The basis of life of all living and creating a comfortable temperature for the baby.
What is amniotic fluid
Amniotic fluid - a fluid that is in the amnion (periconceptional bag).Amniotic fluid is the intermediate medium between the organism of mother and fetus during pregnancy and the necessary environment for the fetus, which performs multiple functions to ensure its growth and development.
volume of amniotic fluid properties vary depending on the duration of pregnancy, the mother and the fetus.The amount of amniotic fluid in the 8 weeks of pregnancy is 5-10 ml at 10 weeks - about 30 ml at 18-20 weeks - 250-280 ml.The maximum amount of amniotic fluid (1 - 1.5 L) noted in the period between the 30th and 38th weeks of pregnancy to the end of pregn
- appearance and composition
In early pregnancy the amniotic fluid is usually colorless and transparent, the end of pregnancy they become unclear due to ingress of secretions of the sebaceous glands, vellus hair, skin flakes fruit.
amniotic fluid have a slightly alkaline reaction, low weight, and low viscosity.By the end of pregnancy in the amniotic fluid provides a stable quantity of mineral substances (in mg per 100 ml of fluid): sodium - 175.3, chlorine - 363, potassium - 27 P - 2.46, calcium - 7.35.
most important part of the amniotic fluid are proteins, they contain 210 to 390 mg per 100 ml.Besides proteins it contains free amino acids, fats, fatty acids, vitamins A, C and B, human chorionic gonadotropin (the hormone that is always present during pregnancy), steroid hormones, enzymes, and several other substances, e.g., clotting factors.Insulin is present in the amniotic fluid from the 16th week of pregnancy.
What are the amniotic fluid
amniotic fluid are directly involved in the exchange of substances between mother and fetus.Due to the amniotic cavity amniotic fetal body flows through the skin, gastrointestinal tract and lungs.By the 25th week of pregnancy, the skin and pulmonary exchange reduced, the main importance is the result of ingestion of amniotic fluid, which come in his digestive tract.The fetus ingests 300 to 500 ml, and it identifies the urine and alveolar (lung of) the secret.After the surface of the placenta amniotic fluid can pass from the amnion in fetal blood and vice versa.
amniotic fluid are a kind of shock absorber in the mechanical injuries and maintain the constancy of the environment surrounding the fetus.The amniotic fluid is a constant and rapid metabolism improves metabolism and losing weight without dieting : each hour is replaced with 0.33 liters of water and a large part of mineral salts.For about three hours the composition of amniotic fluid is completely updated.
Amniotic fluid is important for fetal development Fetal development - week after week , which differ in certain stages of pregnancy.In the first weeks of the embryo has the consistency, consistency is a little different from the amniotic fluid, which makes it possible to his development as a whole and the development of individual parts.With the development of the fetus becomes movable, the movements are amplified, they are only possible in a liquid medium.If insufficient quantity of amniotic fluid or with their complete lack of possible fusion of the skin of the fetus to the amniotic sack (amnion) and the development of various malformations.
Effect of amniotic fluid at birth
the end of the pregnancy the amniotic fluid is usually divided into two unequal parts.Water in the sac below the belt touch the fetal head to the pelvis woman called the front waters.Rear water washed the base of the trunk and the head of the fetus.In the absence of contact between the belt in the case of mobile-head over the entrance to the pelvis, transverse or oblique position of the fetus water separation front and rear does not occur.
amniotic fluid contribute to the disclosure of the cervix and uterus muscle activity.In premature discharge of amniotic fluid in early pregnancy usually occurs an interruption or premature delivery.
Methods diagnostic study of amniotic fluid
amniocentesis allows to evaluate the status and maturity of the fetus and the need to address questions about the delivery or carry out the necessary treatment.In order to examine the amniotic fluid, held a special puncture (puncture) bag of membranes (amniocentesis).Then, a study of cellular, hormonal, biochemical and immunological composition of the amniotic fluid, and then makes recommendations for the further management of pregnancy.