Pregnant women lack of inorganic salts or trace elements can cause fetal abnormalities, pregnant women often eating contaminated food will also cause fetal malformations. By DDT, 666 organochlorine pesticides and organomercury pesticides and pesticide pollution of West accumulation of the strong food into the body, it will accumulate poison through the blood circulation into the placenta to cause fetal poisoning in pregnant women, causing abortion and fetal death. The United States used a large amount of herbicides on the battlefield in Vietnam, which caused many pregnant women to develop deformities, such as facial coloboma, frontal fissure, ossification, and so on. In the early 50s of this century, unusual changes took place in the waters of Japan's troubled waters: fish float on the sea, birds fly into the sea, shellfish rot and algae die. What's more, the cat went mad like a drunk, hobbled gait, and finally jumped into the river". Only in 1959 that cat is mercury in fish and shellfish to eat in the Gulf of Minamata caused by the. At the same time, the cat and similar patients, especially eating by mercury contaminated fish and shellfish food for pregnant women, cause fetal congenital mercury poisoning, after birth showed dysplasia, mental retardation, some brain damage caused by paralysis of death. There is a family in the US state of New Mexico, had used alkyl mercury treated food to feed the pigs, family members eat the pork after 3 people in mercury poisoning. Is the early pregnant housewife, I have no obvious symptoms of poisoning, but later the boy appeared symptoms of tremor, muscle spasms and other congenital mercury poisoning, almost full capacity still ignore 1 years of age, can not sit. In 1968, a strange disease was discovered in Aichi Prefecture of Japan. The patients had swollen eyelids, sweaty palms, red spots, serious nausea and vomiting, decreased liver function, aching muscles and coughing. In a few months, the patient has increased to more than 5000 people, 16 deaths. After the Ministry of health investigation found that the dead viscera and subcutaneous fat containing PCBs, the concentration reached 13 - 70ppm - this is the killer". Instead, the original is an edible oil in the production of rice bran oil when entering into the PCBs, causing food poisoning. In the poisoning patients in 13 pregnant women, the 2 stillbirth, ll live birth in the competition 10 is the "Black Doll": black skin, light weight, long teeth, skull early calcification, exophthalmos and other kind of disfigurement. Food pollution is so cruel and shocking. Pregnant women should not be advised to eat all kinds of food that may be contaminated, so as to bring lifelong regret.