The purpose of screening tests is to eliminate those who are at higher risk than normal. In this way, definitive diagnostic tests can be applied to the group considered to be at risk, with a more detailed evaluation.
Screening tests are applied on certain subjects and at different weeks of pregnancy. Depending on the increased risk, a definitive diagnosis may be required. Interventional procedures (such as chorionic villus biopsy, amniocentesis, cordocentesis, etc.) may be applied for definitive diagnosis. These procedures carry a small (0.5-1%) risk of miscarriage.
11-14. SCREENING BETWEEN WEEKS OF PREGNANCY: Between these weeks of pregnancy, the baby in the womb is evaluated by ultrasound performed by a perinatologist, the presence of nasal bone (NB), nuchal translucency (NT) measurement and dual screening (PAPP-A and beta-hcg) test, and especially Down syndrome ( The combined risk calculation for Trisomy 21), Trisomy 18 and Trisomy 13 is made with very high sensitivity.
SCREENING IN THE SECOND TRIMETH: Pregnancy 16 -18. It is appropriate to do it between weeks. It is also applied as a triple (alphafetoprotein, estriol, beta-hcg) or quadruple (alphafetoprotein, estriol, beta-hcg and inhibin A) test together with ultrasonographic evaluation. In this test, in addition to trisomies, a risk assessment is also made in terms of neural tube defects (the general name for diseases that cause an opening in the baby's waist, back and skull).
SCREENING FOR DIABETES IN PREGNANCY: in the second trimester. Screening and diagnostic tests performed (usually between the 24th and 28th weeks); Depending on the preferred test, it is performed by drinking a liquid containing either 75 grams of glucose in one step or 50 grams in two steps and 100 grams if necessary, and then evaluating the blood sample. If the expectant mother has a high risk of diabetes, these tests can be performed earlier in the pregnancy. These tests do not have any serious effects on the mother or baby.
Read: 0
