In this case-control study, boys who had been diagnosed with autism were more than three times as likely as neurotypically developing boys to have been born to mothers who reported consuming one or more servings per day of diet soda, or comparable amounts of the leading artificial sweetener aspartame, during pregnancy or breastfeeding. No statistically significant association was found in female offspring.

Read more at
https://www.accessibilitynewsinternational.com/drinking-diet-sodas-and-aspartame-sweetened-beverages-daily-during-pregnancy-linked-to-autism-in-male-offspring/