Imo, for gender that could reasonably be a personal choice and the boomers telling her she should wait are kinda dicks.
Testing for genetic issues I would absolutely do and I think others should, but it is of course still their personal choice and shouldn't be forced on them. I would abort a fetus with any genetic issue. The sooner to find out the better. Fo others who wouldn't terminate, knowing ahead if time that they are going to have a disabled child would at least give them time to prepare.
Also, obligatory reminder that, technically speaking, people with down syndrome are not actually human because they have a different number of chromosomes. Offspring of a species having a different number of chromosomes from their parent generation, then reproducing with other offspring of the parent species that have the same number of chromosomes as them is a recognized route of evolution from an ancestor species to a new species. It may not sound PC, but that's biology. (Example, lots of species of daisies that look similar, but cannot be cross-pollinatated.)
The blood on my hands covered the holes