If a family has aggressive cavity causing bacteria, they are typically traded to the infant at those cuddly slobbery spoon sharing times. But, please do not stop being cuddling nurturing parents. There is another way! The contagious disease is dose dependent. Research has shown that cleaning up mom and dad's oral health before baby is born, or at least before infant teeth show up, is an excellent way to reduce bacterial count and improve outcomes for baby. By the way, this includes improving odds for full-term pregnancy.
A good way to start would be a dental checkup. However, by "cleaning up oral health" I don't mean necessarily getting those expensive cavities filled, though that obviously helps too. Immediate and inexpensive, or even free things people can do are:

