Mrs. Brown only had serum analyte screening.  For a more recent discussion of newer screening technology, you can view this short video from the Washington State Department of Health and the Genetic Support Foundation.

Prenatal Cell-Free DNA Screening (cfDNA Screening)

For a discussion of how patients can decide about prenatal genetic testing, you can view this short video from the Genetic Support Foundation.

See also https://www.geneticsupport.org/videos/

And for additional resources from the Genetics Support Foundation: https://www.geneticsupport.org/