Karyotyping of fetus can be done by all Except: (A) Chorionic villus sampling, (B) Cordocentesis, (C) Amniocentesis, (D) Fetal skin biopsy
Answer is D. Karyotyping is a test to examine chromosomes in a sample of cells. This test can help identify genetic problems as the cause of a disorder or disease. In utero sampling of fetal skin, liver, and muscle may be required to diagnose before-bih disorders that cannot be diagnosed by analysis using chorionic villi or amniotic fluid. Refer robbins 158