Current controversies in prenatal diagnosis 2: Down syndrome screening: is ultrasound better than cell-free nucleic acids in maternal blood?

MeSH terms

• Blood Chemical Analysis / methods
• Blood Chemical Analysis / standards
• Cell-Free System / chemistry
• Consensus
• Dissent and Disputes*
• Down Syndrome / diagnosis*
• Female
• Humans
• Mass Screening / methods*
• Mothers
• Nucleic Acids / analysis
• Nucleic Acids / blood*
• Pregnancy
• Prenatal Diagnosis / methods
• Prenatal Diagnosis / trends*
• Ultrasonography, Prenatal / standards