Human Growth and Development / Unit 2 HGD 0196 short lesson, about 20 seconds
Environmental Teratogens
Captions available
The idea
Environmental teratogens include radiation, lead, mercury and PCBs, industrial chemicals, which can reach the embryo or fetus through the mother.
In practice
Lead from old pipes or paint becoming a hazard long before a baby is born.
Where people slip
Fathers' exposure matters here too: toxins and smoking affect sperm, and secondhand smoke lowers birth weight.
Your place on the trail
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