Pregnant women should beware of foods that may cause birth defects

　　1. Tuna
　　
　　A U.S. environmental group found that the mercury content in 7 types of seafood, including tuna, seriously exceeded standards, and that pregnant women who regularly consumed it could give birth to fetal abnormalities. A Hong Kong doctor pointed out, fetus Excessive mercury absorption in the mother's body can affect the brain nerve Development, future learning ability will be defective, as well as sequelae such as delayed intellectual development.
　　
　　Expectant mothers should reduce their consumption of canned tuna, cod and pollock, as these canned fish also contain high levels of mercury, and their consumption should be limited to once a month.
　　
　　2. Pork liver
　　
　　Finland and the United States have advised pregnant women to eat less pork liver. This is because too much fattening agent is added to modern feed for rapid fattening of livestock, which contains a high content of vitamin A, causing it to accumulate in the liver of animals.
　　
　　If pregnant women eat too much pork liver, a large amount of vitamin A will easily enter the body, which will be very harmful to the development of the fetus and even cause teratogenesis. Excessive amounts of vitamin A can cause damage to almost every part of the body, including Eye , bones, blood, skin , central nervous system, liver, reproductive and urinary system.