Genetics: update on prenatal screening and diagnosis

Area of Science:

• Prenatal diagnostics
• Medical genetics
• Reproductive health

Background:

• Significant advancements in screening for Mendelian and chromosomal genetic disorders.
• Microarray analysis on fetal tissue indicates a minimum pregnancy risk of 1 in 150, potentially exceeding 1%.

Purpose of the Study:

• To advocate for universal offering of prenatal diagnostic procedures.
• To discuss the evolving landscape of genetic testing methodologies.

Main Methods:

• Review of current prenatal screening technologies.
• Discussion of microarray analysis and emerging sequencing techniques.

Main Results:

• Current prenatal screening identifies a significant baseline risk for genetic abnormalities.
• Microarray analysis provides detailed genetic information from fetal samples.

Conclusions:

• All patients, irrespective of age, should be offered chorionic villus sampling/amniocentesis and microarray analysis.
• Future genetic testing will likely be dominated by sequencing techniques, with sample source (villi, amniotic fluid, or maternal blood) being the primary variable.