It is performed usually around 16 week (15 to 19 weeks) this is indicated for chromosomal abnormalities fetal screening in x-linblood clauses, additional confirmation of N.T.D. (alpha fi to protein and a ctyl choa nasterrase) in form metabolic emon detection (enzymes, metalrolites), DNA nobing, assessment of rhesus senntization.
Treatment Procedure:
Patient is prepared following a comprehensive counseling & Ad undertaken while carrying for ultra surgical radio logical care. The risks of delay in results, infection, hematoma are always considered carefully. This is also discussed with the patient that there are almost 1 % risks of miscarriage trauma, hemorrhage, preterm rapture of memleranes palom and Rh semetization, deformities pregnancy loss is app. 0.6 to 0.9% higher after C.V.S. as composed to amniocentesis.