Periumbilical abdominal wall defect is one of the symptoms of umbilical bulge (omphalocele), also known as umbilical hernia, is due to the embryo in 6~lO weeks in the middle of the abdomen, periumbilical abdominal wall developmental defects, skin, muscle and fascia defects, resulting in delayed disappearance of the fetal physiological midgut hernia or even does not disappear, abdominal contents protruding from the umbilical cord inside the abdominal wall outside the peritoneal membrane and amniotic membrane covering the surface. Umbilical hernia prevention from pregnancy should pay attention to prevention, reasonable diet, regular maternity check is very important. 1, pig liver Finland and the United States have put forward to the pregnant women should eat less pig liver advice. Because in the rapid fattening of livestock in the modern feed, added too much fattening agent, which vitamin A content is very high, resulting in a large accumulation of it in the animal liver. Pregnant women over-eating pig liver, a large amount of vitamin A will easily enter the body, the development of the fetus is very harmful, and even cause malformation. Vitamin A overdose will cause damage to almost every part of the body, including eyes, bones, blood, skin, central nervous system, liver, reproductive and urinary systems. 2, tuna U.S. environmental groups found with tuna, including seven kinds of seafood, mercury content is seriously excessive, pregnant women often eat will give birth to teratoid. A Hong Kong doctor pointed out that the fetus in the maternal body to absorb excessive mercury, will affect the neural development of the brain, the future ability to learn will have defects, as well as intellectual development delay and other sequelae. 3, too much acidic food Research has found that pregnant women consume too much meat, fish, chocolate, sugar and other acidic foods, their body fluids will change, forming a “acidification”, further promoting the blood catecholamine levels increase, thus causing pregnant women irritable and other negative emotions. This adverse negative emotions, can make the mother’s body hormones and other toxic substances increased secretion, which may cause fetal cleft palate, cleft lip and other organ development deformities. 4, contaminated food Pregnant mothers lack of inorganic salts or trace elements can lead to fetal malformation, pregnant women often eat contaminated food will also cause fetal malformation. By DDT, hexachloride pesticides and organic mercury pesticides, such as organic pesticides, such as Cilicium pesticide accumulation of pesticides contaminated food into the body, the poison will be accumulated in the pregnant woman’s body through the bloodstream into the placenta leading to fetal toxicity, resulting in miscarriages, teratology, stillbirths and so on. Therefore, contaminated food must not be eaten. For the smooth birth of a healthy baby, the above food pregnant women must reduce the amount of food, and regular obstetric examination is also very necessary.