The maturation of the placenta: how life grows
The placenta is an important organ that forms temporarily, however, bears the main functions of providing the child with all the necessary nutrients for proper development.Judging by how quickly the placenta matures, judged on the state of utero-placental circulation - the main means of communication between mother and child.
What is placenta
placenta (afterbirth) - this is a disc that on one side is attached to the wall of the uterus and grows into it, and the other from him as part of the umbilical cord blood vessels going to the fetus.Between the walls of the disk is a complicated tangle of arteries and veins through which nutrients and oxygen to the fetus receives and displays the fruit of metabolic products and carbon dioxide.Placenta also protects the baby against infections and toxic effects of various substances that may be in the body of the mother.The placenta carries and hormonal function, providing the growing fetus and uterus all the necessary hormones.
beginnings of the placenta appear at the end of the second week of pregnancy after embryo exits the fallopian tube and into the mucous membrane of the uterus, penetrating into it as deeply as possible.In the first 10-12 days, the embryo is fed nutrients included in the fertilized egg, so it is not related to the mother's blood, and it can not hurt to receive the mother of any toxic substances.But after this period, the admission of women of alcohol, drugs or any other toxic substances will necessarily impact on the fetus.
placenta begins to operate with 14-16 weeks of pregnancy, but it does not remain constant throughout the pregnancy, and changes so as to ensure the livelihoods of the fetus and maintain a state of pregnancy.The placenta there are new blood vessels, and its nap deeper embedded in the uterine wall.
As the placenta matures
placenta matures gradually, reaching full maturity at about 36 weeks of pregnancy.First, its volume and weight is increasing, but the full maturity begins its gradual aging of the zapustevaniem with blood vessels in the placenta and the emergence of sites of calcification.Also reduced its volume and weight.Born placenta after the birth of the fetus, and weighs about 500 grams
degree of maturation of the placenta can be determined by ultrasonography (US), since the maturation varies its density tissue (ehostruktura).The study compared the degree of maturity of the placenta from pregnancy.On US also visible lime deposits in the placenta.
degree of maturity of placenta is determined starting from 26 weeks of pregnancy - from that time she was beginning to specific changes at the edges of the placenta, which are gradually moving towards its center.All of these changes can be divided into four stages (from zero to the third).Normally, the zero stage of maturation observed in the placenta of about 27-30 weeks' gestation, the first - in the 27-36 week, the second - in the 34-39 week, the third - after 36 weeks.
the third stage of maturation decreases the volume and weight of the placenta and the emergence of areas of calcification in it - this process is called aging of the placenta.
Premature aging of the placenta
Sometimes the placenta begins to age far ahead of time.The last stage of its maturation may occur before the 30th week of pregnancy.This can happen in women who have had abortions, obstructed labor, uterine trauma, infections of the uterus, and various acute and chronic diseases, including female genital organs, endocrine disorders, severe toxicosis of pregnancy.Too low attachment of the placenta also contributes to its premature ripening.
Sometimes premature maturation of the placenta is an inherited characteristic, and is transmitted from generation to generation.Premature aging of the placenta still does not mean that the fetus definitely suffer - the body of a pregnant woman is such that can compensate for some minor circulatory disorders.About the impact on the fetus has a premature aging placenta, as judged by the fruit itself and as utero-placental blood flow.To do this, conducted additional ultrasound and cardiotocography (CTG) of the fetus, whose results and talk about his condition.
When circulatory disorders of the fetus can develop fetoplacental insufficiency placental insufficiency - a deviation from the norm , causing the fetus begins to lag in weight due to insufficient supply of nutrients and tissue suffer from lack of oxygen.Placental insufficiency may lead to serious changes on the part of the brain and other organs of the fetus.
maturation of the placenta - an important indicator of how well the pregnancy proceeds and the child develops.