The bad news is that babies get exposed to pesticides and other harmful chemicals during pregnancy and through their mothers’ milk. The good news is that all the research we have shows that mothers’ milk is best for babies despite this exposure. But I suspect most mothers would be happy to minimize that exposure if they could. The Environmental Working Group has a tool you can use to do that: The Shopper’s Guide to Pesticides. You can look at their lists of most and least contaminated fruits and veggies and adjust what you buy. If you can’t afford to buy all your food organic, you can focus on the produce that is most likely to be heavily contaminated.