Have you heard you couldn't? I'm almost 22 weeks and I eat it, I crave salad? Curious never heard that
I eat it, I haven't heard anything bad about it while pregnant.
The only foods to avoid are uncooked or rare meats, eggs, seafood, and fish (and limit cooked fish to 12oz per week and 6oz tuna due to mercury.) Unpasteurized dairy. Soft serve ice cream. Alcohol. Drugs.
And wash your produce thoroughly to clean off bacteria.