The second screening during pregnancy

By Admin | Pregnancy And Childbirth
23 May 2016

CIS screening study have started recently and is actively used for management of pregnant women.This method allows the study to establish risk of complications and the formation of congenital abnormalities in the fetus.The first survey conducted in the first trimester and the second screening in the second trimester, from 16 to 20 a week.

During the second screening in pregnancy is carried out on the exact biochemical special tests the mother's blood.This survey called "triple test" - an analysis of the level of blood in the following substances: human chorionic gonadotropin, free estriol, alpha-fetoprotein.Some clinics are shortened version of the test.It is also necessary to control ultrasonography, which is a mandatory part of screening at this time.And preferably donating blood and ultrasound to spend in one day.The study of these specific proteins and hormones in the blood of the expectant mother suggests the risk of the formation of the fetus following defects: neural tube defects, Down syndrome


addition results of the second screening may indirectly be a sign of an abnormal condition for the development of the fetus and complications of pregnancy.For example, high levels of human chorionic gonadotropin may indicate a multiple pregnancy, the risk of preeclampsia in pregnant or having diabetes.A low hCG often constitutes a violation of the placenta.When there is high or low alpha-fetoprotein, and inhibin A in maternal serum is evidence of abuse of congenital abnormalities: trisomy 18, and the likelihood of trisomy 21 and open neural tube defects.With a sharp increase in AFP is sometimes the fetus can die.Signal abnormalities in the system are modified fetoplatentsarnoy free estriol level.

If not correct at least one screening parameter, then you must undergo additional comprehensive examination.Sometimes the results of screening influenced by factors that could significantly change the performance tests: the weight of the pregnant woman, in vitro fertilization, diabetes and bad habits of the future mother.Biochemical analysis of blood in multiple pregnancy is not recommended, as the results in this case are too high, and to calculate the accuracy of the risk is very difficult.