深圳华大基因做无创。依据最权威的美国妇产科协会指南:“New guideline for DNA-based aneuploidy screening — Examination of cell free fetal DNA from the plasma of pregnant women has high sensitivity and specificity for detection of trisomy 21, 13, and 18, but the role of this test in screening for these abnormalities is unclear. In December 2012, a Committee Opinion from the American College of Obstetricians and Gynecologists (ACOG) suggested offering this test as a primary screening approach for women with singleton gestations at increased risk of fetal aneuploidy and as a secondary screening test to women with a screen-positive result on maternal analyte testing——Committee opinion no. 545: noninvasive prenatal testing for fetal aneuploidy. ObstetGynecol 2012; 120:1532.”