In my previous article I discussed mercury and vaccines as possible causes of autism. Now, I will look at elements that babies are exposed to in the womb that may predispose them to getting autism.
Mercury Amalgam Fillings
Mothers who have mercury fillings, which contain 50 percent mercury, when pregnant, or who have them before pregnancy, may have an increased risk of having a child with autism. Although mercury fillings have been used for more than 150 years, the safety of such a practice was not studied until recently.
A review published in 2009 found that:
"Mercury from maternal amalgam fillings leads to a significant increase of mercury concentration in the tissues and the hair of fetuses and newborn children. Furthermore, placental, fetal, and infant mercury body burden correlates with the numbers of amalgam fillings of the mothers. Finally, mercury levels in amniotic fluid and breast milk correlate significantly with the number of maternal dental amalgam fillings." (1)
So pregnant women who have mercury fillings could end up leaching mercury into their amniotic fluid and passing it through the placenta to give their babies' bodies burdensome amounts of mercury before they are even born.(6)
If the mother has the fillings removed during pregnancy, this can make the situation worse and cause more mercury to be released. When she begins to breast feed, her baby gets additional mercury from the milk. A study in sheep found that after ewes were given new amalgam fillings and they nursed foster lambs, the lambs received some of this mercury.
"Neonatal uptake of mercury (Hg) from milk was examined in a pregnant sheep model, where radioactive mercury (Hg203)/silver tooth fillings (amalgam) were newly placed. A crossover experimental design was used in which lactating ewes nursed foster lambs. Results from the animal studies showed that during pregnancy, a primary fetal site of amalgam Hg concentration is the liver and after delivery, the neonatal lamb kidney receives additional amalgam Hg from mother's milk.