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How do prenatal screening

Every future mother wants her baby to be healthy, and the pregnancy was calm and easy. Modern diagnostic methods allow in the early stages of pregnancy to identify serious pathologies and malformations of the fetus and make an idea about the health of the future baby. In order to ensure that the baby is healthy and develops normally, all pregnant women should undergo prenatal screening. During the entire period of pregnancy screening is carried out three times.

First trimester screening


The most important is the very first screening, which is carried out in 11-13 weeks. Unlike subsequent studies, it allows you to recognize signs of defects in the development of the nervous system, serious fetal defects and genetic diseases, including - Down syndrome, Edwards syndrome, Turner syndrome, and others. Prenatal screening of the first trimester consists of two stages - fetal ultrasound and biochemical screening.Biochemical research allows to determine special substances in the blood of the future mother, indirectly indicating the pathology of fetal development. If, according to the results of the analysis, a woman is at risk, she is prescribed additional invasive examinations (chorionic biopsy, amniocentesis, cordocentesis).
A biochemical blood test is given by a woman after a doctor performs an ultrasound scan. Ultrasound allows you to identify the most obvious violations in the development of the fetus, if they are present. Ultrasound also allows you to accurately calculate the timing of conception and take the necessary measurements to calculate the risk. During the first screening, the doctor measures the CTE (coccyx parietal size of the fetus), BPR (biparietal head size), as well as the TBP (thickness of the collar space). The increased thickness of the collar space indicates a high risk of having a child with Down syndrome.

Screening for the second and third trimesters


The second prenatal screening is conducted at 20-24 weeks of pregnancy in the middle of the second trimester. With its help, the doctor studies the anatomical development of the fetus and can recognize in time the malformations of the brain, heart, digestive tract, as well as disorders of the development of the limbs and facial bones.
The third prenatal screening is conducted at 30-32 weeks in the third trimester of pregnancy. It allows you to verify the normal course of pregnancy, determine how the child is preparing for birth, and also identify some malformations that appear in the later stages. If the defects detected in the first and second trimester may be an indication for an artificial abortion, the defects of the third trimester, as a rule, are corrected after the birth of the baby.
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