Chorionic villus sampling

/kˌɔːɹɪˈɒnɪk vˈɪləs sˈamplɪŋ/

/kˌoːɹɪˈɑːnɪk vˈɪləs sˈæmplɪŋ/

a prenatal test to detect birth defects at an early stage of pregnancy; tissue from the chorionic villi is assayed