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Democracy Dies in Darkness

Is autism preventable in certain cases after all? Some scientists say yes.

Scientists are raising tantalizing questions about staving off autism, either before birth or in the early month of life.

A young boy works on his sentences as he identifies what takes place in a photo during his therapy session on Oct. 15, 2025, in Auburn Hills, Michigan. (Joshua Lott/The Washington Post)

Obstetrician Jeanne Conry has long paid attention to the “1,300-day window”— the months before conception through a child’s second birthday. Studies show nutrition and lifestyle during this period can shape pregnancy outcomes and the long-term health of the babies. Conry began to wonder if such factors could also influence autism.