Researchers from Ben Gurion University have shown that routine prenatal ultrasound in the second trimester can identify early signs of autism spectrum disorder (ASD). Anomalies occurred in 30% of fetuses who later developed ASD. It means autism could be treated from birth.
https://in.bgu.ac.il/en/pages/news/autism_ultrasound.aspx
https://academic.oup.com/brain/advance-article/doi/10.1093/brain/awac008/6509260