Don’t know if she ever did. The diagnosis (or do they call it prognosis) was based on law of probabilities. I believe it was the amniocentesis lab work? Among her other career skills, she is a nurse today and has 4 healthy children. Now grown.
Well, the science is correct, just our understanding of it is a guess a lot of the time. Doctors and scientists think themselves gods. Well at least Fauci want us to think that he is god.