What is screening and why is it done?
Modern medicine for a few years, has stepped far forward. Predict the presence of certain diseases can be already at the stage of the birth of a new life in the womb. One of these procedures, of course, is screening. This medical event is carried out to pre-determine the possible presence of genetic abnormalities in the fetus in the womb.
Not many future mothers know what screening is. It consists of two interrelated procedures: ultrasound and taking blood from a vein.Based on the data obtained, the possible risks in the field of genetics are calculated. This event can be held in the state women's clinic or in a private paid clinic. It all depends on your wishes. Diseases that are determined by the results of the test include Down syndrome, Edward syndrome, neural tube defect and other severe disorders in the development of internal organs.For the entire pregnancy, this procedure is carried out twice: in the first and second trimester. For each term is characterized by the identification of certain issues.
First trimester screening
What is first trimester screening? Usually he is appointed from the tenth to the thirteenth week of pregnancy. In its framework, a study of ultrasound and blood collection from a vein. The main object of study is the hormone hCG or human chorionic gonadotropin.This substance is the first sign of motherhood and is found only in the body of a pregnant woman. The results obtained are consistent with accepted standards. Based on the results of the obtained data, the degree of possible risk is determined. It must be remembered that screening results may be erroneous.
Second trimester screening
In the second trimester, a medical examination is repeated. "What is screening a second time?" - Potential parents are wondering. The study is conducted from the sixteenth to the eighteenth week of pregnancy. The already studied hCG, ALP and estriol are studied in detail. The high level of the latter is an excellent characteristic, indicating the proper functioning of the placenta.Together with the study of blood data in the first and in the second case, an ultrasound screening is performed on which the development of the baby is visually monitored.
Anyone who is worried about what screening is, how necessary it is to conduct it, and whether the results are accurate, you need to know the following facts.You have the right to refuse to carry out this procedure, despite the fact that many gynecologists strongly recommend it. As a rule, this is due to the presence of a certain risk. These factors include the mature age of the future mother, the presence of genetic and other inherited diseases, miscarriages and other problem situations.
Probability of error
A negative result, although it is a pleasant moment, but can not provide an absolute guarantee of the absence of diseases, but a positive answer indicates a high risk of their presence. Such an answer is extremely rarely erroneous. In any case, it must be remembered that even with the high technology of studying problems, the probability of error is quite high.