Although the evidence does not implicate any single pregnancy-related risk factor as a cause of autism, the risk of autism is associated with advanced age in either parent, and with diabetes, bleeding, and use of psychiatric drugs in the mother during pregnancy.
Cultured freshwater pearls are pearls that are farmed and created using freshwater mussels. These pearls are produced in Japan and the United States on a limited scale, but are now almost exclusively produced in China.his mussel produced a high volume of low-quality pearls that came to be known as  Rice Krispie pearls in the 1970s and 1980s. More than a decade ago the freshwater pearl industry of China shifted production from the cockscomb pearl mussel to the triangle shell mussel (Hyriopsis cumingii).
Ancient Myths About the Pearl. Many myths and folktales surround this ancient gemstone of the sea. Early Chinese civilization considered black pearls a symbol of wisdom and believed they were formed within a dragon's head. Once full-grown, the pearls were carried between the dragon's teeth. According to this myth, one had to slay the dragon to gather the pearls.