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The placenta is a unique body that exists only during pregnancy, it begins to form simultaneously with the baby, nourishes and protects it, and is born after the baby has already seen this world. And the placenta has its own "shelf life." Obusters-Gynecologists TsTA Elena Ivanovna Dementieva and Galina Vladimirovna Ovsyannikov explain why the placenta ripens and why it can "be" ahead of time.
looks placenta as a round flat disk. Its mass is 500-600 g, diameter - 15-18 cm, thickness - 2-3 cm. It distinguishes two surfaces - the maternal (adjacent to the wall of the uterus) and the opposite (fruit).
Immunological protection - holds the cells of the immune system of moms that could perceive the fruit of a foreign body and run the reaction of its rejection, and also misses the maternal antibodies that can protect the child from infections;
Hormonal regulation - Equals the functions of the inner secretion gland and produces hormones (human chorionic gonadotropin (HCG), placental lactogen, prolactin, etc.), which are needed to preserve pregnancy, growth and development of the fetus.
Modern technique allows you to carefully watch your baby before birth. For this, it serves such a study as an ultrasound of pregnancy for weeks.
To find out what time pregnancy ultrasound needs to make every future mother, especially if we are talking about unscheduled surveys associated with suspected pathology, you should contact the help of perinatal diagnostic specialists. However, planned ultrasound is usually carried out on standard-specific pregnancy weeks.
The choice of ultrasound of the abortion for weeks is far from occurring, since each study is carried out for a specific purpose. Find the list of necessary (pr-s MZ of the Russian Federation No. 457 from 28.12. 00) during pregnancy ultrasound and find out what time they need, you can, in the following table:
By the way, it is at such deadlines of pregnancy as 12-22 weeks, an ultrasound is used, including, and to determine the floor of your future baby. The most accurate gender is determined on the second scheduled scan.
In addition, ultrasound in different periods of pregnancy allows you to track down and the condition of the oily water (quantity and qualitative composition, including the presence of third-party impurities), as well as a number of additional indicators that can signal whether or absence Pathologies of pregnancy.
Informativeness and security of ultrasound no matter what time pregnancy is carried out to you the most technology of this type of study: the "picture obtained" is a reflection of the fetal tissues of high frequency waves emitted, and then fixed ultrasound-instrument . By the way, the installation of the last generation will allow you to see the future kid even in a volumetric 3D format.
Specialist services are also experienced and attentive to you and your baby "URO-PRO" - a guarantee of happy motherhood!
Pregnancy is one of the most important periods in the life of a woman. At the same time, this is a physiological process of the development of a fertilized egg to the body, ending with the development of the docking fetus.
The duration of normal pregnancy in women is approximately 10 moon months, i.e. 280 days, calculated from the first day of the last menstruation.
In the ovary of a woman who has reached puberty, the eggs embroidered in them are usually one per month. In case of ovulation, they are released into the abdominal cavity to the surface of the ovary, and it penetrates the uterine tube, where fertilization occurs.
During the advancement in the uterine tube, the embryo acquires the form of a bubble consisting of 32 - 64 cells. The nucleus cells are located in three layers forming germinal sheets. Each sheet formed certain tissues and organs.
By the fourth week, the embryo already has the bookmarks of almost all internal organs, the heart and fastening of the limbs. Initially, the entire surface of the embryo is covered with vintage, and in the future, they die on the most part and persist on the side, directly adjacent to the wall of the uterus. Thus, a placenta is formed, or a child's place - the main body, respiratory and fetus. In addition, the placenta produces hormones necessary for the development and normal course of pregnancy. The blood of mother and fetus is never mixed, and the metabolism and gases occurs through the capillaries of the placenta. Embryon (from Greek. Embryon is a germ), and later the fruit is connected to the floater cord, the length of which is about 50 cm and diameter 1-1. See the developing organism is surrounded by shells that form a fetal bubble filled with oily water protecting it from mechanical effects.
The first 2 months the embryo does not have a human type, and only in the future, characteristic human traits begin to emerge. His age (pregnancy) is determined mainly in length. By the end of 1 month of pregnancy, the length of the embryo is only 8 mm. After 8 weeks, the length of the embryo is 20 mm, the fetal is well expressed separate parts of the body: breasts, belly, head, ears, nose. After 7 months, the embryo is able to exist outside the motherhood. The mass of a normally duddy child is an average of 3.5 kg, and the body length is about 50 cm.
A growing fruit creates increased load on all organs and fabrics of a woman. From the first days of pregnancy in the ovary, a yellow body is functioning - temporary iron of internal secretion, producing a hormone progesterone necessary to preserve and normal flow of pregnancy. The size of the pituitary is increasing, especially its front share. Under the influence of pituitary hormones, the dairy glands increase in volume, become elastic. The volume of the uterus to childbirth increases 500 times, weight - 25 times.
During pregnancy, the body of the woman's body increases by 10-11 kg. Especially noticeable changes in all organ systems are observed in the 2nd half of pregnancy.
The state of the mother strongly affects the development of the embryo and the fetus. Pregnant woman can not be performed by heavy physical work. However, moderate motor activity, walking, charging is not contraindicated.
Influenced by new conditions related to the development of the fetus, complex adaptation-protective changes occur in the body of a pregnant woman. They contribute to maintaining homeostasis and normal activities of bodies and systems, the proper development of the fetus, ensure the preparation of the body of a woman to childbirth and feeding the child. The restructuring of the functioning of the body is pregnant is regulated by the central nervous system with the active participation of the internal secretion glands.
During the whole pregnancy (up to 39 weeks), the excitability of the spinal cord and the uterus receptors are reduced, which ensures the right course of pregnancy. The excitation of the cortex of the brain reaches the greatest degree by the time of the occurrence of labor.
Significant changes occur in the endocrine system. The main source of hormones becomes a fetoplacentage system (FPS), including the adrenal bark and the liver of a pregnant, placenta, adrenal bark and the fetal liver.
The maturity of the placenta varies on weeks of pregnancy. According to it, doctors can judge whether everything is in order with the future mom and fruit. The placenta is a link between the mother and who have not yet born the baby. Thanks to her, all the necessary substances are delivered to the child's body. And if something is wrong with the placenta, it is a reason to take action.
Many women are aware that during pregnancy, crumb in the womb protects the placenta. However, many people know in detail about its functions. Beyond the term "the degree of maturity of the placenta". Let's try to consider it in detail and answer them by the philistine.
Placenta is an organ that is directly in the uterus. This is a link between the organisms of the mother and the child. The placenta is not only in humans, but also in some animals.
Externally, the placenta is similar to a large cake peaked by blood vessels. From it there is a small tail - umbilical cord. Blood circulation between mother and child runs exclusively through this process. Thanks to the barrier, the blood of the baby and the mother never connects.
The child's place is formed from the villi, which then turn into cells and shells. From the side of the child, the placenta is smooth, and from the side of a woman - buggy. Initially, the thickness of the organ is only about 10 mm, and then in the process of pregnancy it thickens to 33 mm.
placenta, photo of which looks not very aesthetic, performs several functions at once. Among them:
Women who have already burned, know that the placenta comes out of the body after the kid. Sometimes the procedure does not cause too pleasant sensations.
I am often asked: why do the doctors necessarily consider the placenta in detail? Doctors analyze the structure, last color. This allows you to find out if the child did not suffer in the uterus, whether he had hypoxia and other development deviations. Also, doctors check whether the slices of last in the uterus remained.
Thus, it is clear that one of the most important organs that are formed during pregnancy is a placenta. The structure of the organ allows it to perform all the necessary functions. Deviation in activities, the size or structure of the kindergarten may result in serious consequences.
The placenta is formed, changing and grows along with the crumb. However, she protects the baby far from immediately and does not occur when conceived. When is the placenta forms? This happens approximately at the twelfth week of pregnancy.
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