Methods of prenatal diagnosis for chromosomal abnormalities: The disadvantages Posted on August 16, 2017September 11, 2017 by admin Mamopoulos A Posted in 2005 Volume 4 – Issue 2 Tagged 1st trimester biochemical test, 2nd trimester biochemical test, amniocentesis, chorionic villus sampling, nuchal translucency, prenatal diagnosis, ultrasonography