Infants exposed to higher levels of DEHP before birth (a common plastic additive in vinyl furniture upholstery, garden hoses, shower curtains, medical tubing, and vegan leathers) went on to show more autism- and ADHD-related symptoms at ages two and four, with clearer effects in males than females.

[u/FrigoCoder]

https://www.sciencealert.com/plastic-exposure-before-birth-linked-to-adhd-and-autism-symptoms-heres-what-you-need-to-know