Finally the mother caught on, and a wing and a foot emerged in a breech birth-a successful one. Although fewer than 20 percent of American Children have utilized them, dental sealants, a thin plastic coating painted on the surfaces of the teeth, are commonly recommended by dentists to prevent tooth decay, especially when teeth have deep pits and grooves. However, a new study raises questions about sealants. A leach into the saliva of treated patients, the study found. Laboratory studies show that BPA, at levels lower than those measured in the study, can stimulate human cells to grow in the same way that estrogen does.
Numerous studies document that the fetus is highly sensitive to hormones and hormone-like chemicals.
The effects on children and adults are less clear, although the younger the indivivual, the more caution is recommended. And mother's milk may have another payoff - boosting a child's IQ scores. The studies show that nursing a baby lowers the mother's chance of breast cancer, helps her loose weight after pregnancy and may act as a natural contraceptive. New evidence suggests that breastfeeding may make babies smarter. Researchers have found small increases in cognitive development in breastfed babies when compared to bottle-fed babies.