We've heard mixed things about this. But we asked our Guatemalan sources who are familiar with the ways of Mayan midwives.They told us that small amounts (less than a ceremonial dose) are probably fine during pregnancy.But while we believe concern about heavy metals in cacao and chocolate have become exaggerated, there does appear to be a real reason for caution about amount and frequency during pregnancy. Check out our longer report on heavy metals in cacao and chocolate.