Amniocentesis and chorionic villus sampling are prenatal procedures that detect congenital abnormalities. classify each statement as a characteristic of amniocentesis, chorionic villus sampling, or both. answer bank:
* normally conducted about 16 weeks after conception
* requires cell cultures
* conducted as early as 10 weeks after conception
* used to prepare a fetal karyotype
* uses placental tissue
* may increase the risk of dental limb defects

(subject is really genetics)