Noninvasive prenatal detection and selective analysis of cell-free DNA obtained from maternal blood: evaluation for trisomy 21 and trisomy 18
Selective analysis of cell-free DNA in maternal blood for evaluation of fetal trisomy
Chromosome-selective sequencing of maternal plasma cell-free DNA for first-trimester detection of trisomy 21 and trisomy 18.
Incorporating First-Trimester Down Syndrome Studies Into Prenatal Screening
Comparing Three Screening Strategies for Combining First-and Second-Trimester Down Syndrome Markers
Screening for Fetal Chromosomal Abnormalities
First Trimester Diagnosis and Screening for Fetal Anueploidy
First and Second Trimester Antenatal Screening for Down's Syndrome: The Results of the Serum, Urine and Ultrasound Screening Study (SURUSS)