[rcme]

In the US, when we had a kid, we had genetic screens done for over a hundred genetic diseases. The baby’s DNA was also tested for Down’s.

[Scoundreller]

Can do a blood test on the mother for Down's. Enough baby DNA leaks out into her bloodstream and you can see if the chromosome ratios are the slightest bit off or not.

[ftxbro]

i wonder does the mother get any phenotype if she has a lot of dna in her bloodstream that has too many chromosomes

[karaokeyoga]

Same here, for our second child, since her mother had moved into a higher-risk age category by then. This was in San Francisco in 2005.