Prenatal diagnosis is examining the samples including genes or chromosomes belonging to the foetus before birth. For prenatal diagnosis, samples belonging to the foetus are obtained by invasive methods.
Chorionic villus biopsy (CVS) is one of these methods and in this method, sampling is made from intra uterine face of placenta in the 10th week of pregnancy for genetic examination.
Same examination could be made by another method called Amniocenteses (AS) in the 16th week of pregnancy. Amniocenteses (AS) is sampling from the liquid that contains the foetus.
It is possible to perform another examination called Cordocenteses (CS) after the 20th week of pregnancy or if there are doubts about earlier examinations. Cordocenteses is sampling from foetus’ cordon blood and making genetic examinations on foetal blood.
CVS, AS or CS are performed by obstetricians and gynecologists and samples are tested in genetic diagnosis centers.
Indications of Prenatal Diagnosis are;
(X and Y)
For more detailed info about prenatal diagnosis processes and methods please visit www.gebelikvegenetik.com web site.