It looks like children’s bodies remember exposure to cigarette smoke and other toxins – even from before they’re born.

New research from Johns Hopkins Bloomberg School of Public Health has found that environmental exposure to cigarette smoke in the womb can remain in the body for years, and may impact a child’s health for years after birth.

The findings may also show a link to exposure to other potential toxins during pregnancy – such as chemicals in plastics and contaminants in drinking water.

The goal of the study is ultimately to link these exposures to the development of autism, obesity or other aliments and possibility give insight into prevention.

It’s more important than ever to play it safe when you’re expecting and be aware of your surroundings and what goes into your body.