Screening in the 2nd trimester of pregnancy is one of the most informative stages of prenatal diagnosis, because it is during this period that the fetal anatomy can be assessed in detail and most congenital malformations can be detected before birth. That is why doctors pay special attention to it. The results of the second prenatal screening directly affect the further tactics of pregnancy management and minimize the risks for mother and child. <\/p>\n\n
2 screening in pregnancy is a comprehensive examination, including ultrasound and biochemical blood tests, which is performed at a certain time to assess fetal development, identify possible defects and determine the likelihood of chromosomal abnormalities. In addition, prenatal second screening is important for assessing the risk of pregnancy complications (gestosis, intrauterine growth retardation) and allows for timely adjustment of the pregnancy management plan or referral of<\/a> the patient for additional examinations. <\/p>\n\n Prenatal screening methods of the 2nd trimester and their purpose:<\/p>\n\n When evaluating the results, the doctor combines the data from ultrasound and tests, takes into account the woman’s age, anamnesis and other factors to understand individual risks and determine further pregnancy management tactics.<\/p>\n\n Important!<\/strong> The second screening does not make a diagnosis, but only assesses the risks of possible malformations. If the results of the examination show an increased risk, this does not mean that the fetus has a 100% pathology. In this case, the doctor may recommend additional examinations to confirm or refute the assumptions. <\/p>\n\n The second screening is performed in the second trimester of pregnancy, when the fetal anatomical structures are sufficiently formed for a detailed assessment. The optimal time is between 16 and 20 weeks of pregnancy. Most often, the examination is performed at 19 weeks. <\/p>\n\n Adherence to the recommended timing of prenatal screening in the 2nd trimester is important because it is during this period that most congenital malformations can be detected and the risks of chromosomal abnormalities can be correctly assessed.<\/p>\n\n The 2nd trimester ultrasound screening is a detailed examination during which the doctor assesses the fetal anatomy and the course of pregnancy step by step. The procedure is performed through the anterior abdominal wall, is painless, and takes an average of 20-40 minutes depending on the fetal position. <\/p>\n\n Ultrasound allows you to assess the anatomical parameters of the baby and the course of pregnancy. During an ultrasound in the second trimester, the doctor pays attention to the following parameters: <\/p>\n\n Ultrasound screening of the second trimester of pregnancy allows to detect most structural changes and assess the fetal condition with high accuracy.<\/p>\n\n Biochemical screening of the second trimester is a blood test of a pregnant woman that allows you to assess the risks of chromosomal abnormalities and some fetal malformations by the level of specific markers. During the study, it is determined: <\/p>\n\n The analysis indicators are not evaluated in isolation but are converted into special coefficients (MoM). The conditional norm for most markers is 0.5-2.0 MoM. Deviations may indicate increased risks, but are not a definitive diagnosis. <\/p>\n\n Prenatal screening of the 2nd trimester allows you to identify or suspect a wide range of abnormalities:<\/p>\n\n The second screening is one of the most important stages of prenatal diagnosis, as it allows you to identify most serious disorders during pregnancy and timely determine further observation or treatment tactics.<\/p>\n\n\n
When to have a second screening during pregnancy?<\/h2>\n\n
Expert ultrasound of the second trimester of pregnancy: what it shows<\/h2>\n\n
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Biochemical screening of the 2nd trimester: indicators and norms<\/h2>\n\n
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Diseases that can be detected at the second prenatal screening<\/h2>\n\n
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Decoding the results of the second screening<\/h2>\n\n