1, canned food Canned food in the production process are added to a certain amount of additives, such as synthetic colors, flavors, preservatives and so on. Although these additives do not have a significant impact on the health of adults, but pregnant women eat too much is not good for health. In addition, the nutritional value of canned food is not high, after high-temperature processing, the vitamins and other nutrients in the food have been damaged to some extent. 2, spinach People have always believed that spinach is rich in iron and has a blood function, so it is taken as a good vegetable to prevent anemia during pregnancy. In fact, spinach does not contain much iron, but a lot of oxalic acid. Oxalic acid can affect the absorption of zinc and calcium. The body of calcium and zinc content of pregnant women is reduced, affecting the growth and development of the fetus. 3, chocolate and hawthorn excessive consumption of chocolate will make pregnant women feel full, thus affecting the appetite, the result is that the body is fat, but the lack of essential nutrients. Pregnant women prefer to eat sour things, hawthorn has become the fruit of choice. Hawthorn has an exciting effect on the uterus, pregnant women over-eating can make the uterus contraction, resulting in the possibility of miscarriage, so to eat less. 4, pig liver Finland and the United States has put forward to pregnant women should eat less pig liver advice. Because in the modern feed for rapid fattening of livestock, adding too much fattening agent, which has a high vitamin A content, resulting in a large accumulation of it in the liver of animals. Pregnant women over-eating pig liver, a large number of vitamin A will be easy to enter the body, the fetal development is very harmful, and even teratogenic. 5, long-stored potatoes Potatoes contain alkaloids, and the longer the potatoes are stored, the higher the alkaloid content. Excessive consumption of such potatoes can affect the normal development of the fetus and lead to fetal malformations. Of course, people are very different, not everyone will be abnormal after eating, but pregnant women are better off not to eat, especially not to eat long-term storage of potatoes. 6, hot ingredients pregnant women eat hot ingredients cumin, star anise, pepper, pepper, cinnamon, five spice powder, etc. Easily consume intestinal water, so that the gastrointestinal secretion is reduced, resulting in intestinal dryness, constipation. After constipation, pregnant women are bound to force to hold their breath to relieve the stool, so that the increase in abdominal pressure, pressure on the fetus in the womb, prone to fetal movement, premature delivery and other adverse consequences. 7, MSG The main component of MSG is monosodium glutamate, the zinc in the blood combined with its excretion from the urine, MSG intake will consume a large amount of zinc, resulting in zinc deficiency in pregnant women. The zinc is necessary for the growth and development of the fetus, so pregnant women should eat less. 8, pickles: contains nitrosamines, can lead to fetal abnormalities. 9, drinking tea A doctor in the United Kingdom found that tea contains a lot of fluoride components, a cup of tea in the fluoride content of up to 1.25 mg. If used to feed pregnant mice, it was found that the mice born with skeletal deformities, fluoride on the fetus, although not yet sure, but still do not drink strong tea is good. Drinking strong tea during pregnancy, not only prone to iron deficiency anemia, affecting the supply of nutrients to the fetus, because of the strong tea contains caffeine, but also increase the heartbeat and urination of pregnant women, increasing the burden on the heart and kidneys of pregnant women, to the detriment of maternal and fetal health. 10, drinking coffee and cola-type drinks The main components of coffee and cola are caffeine, colaine and other alkaloids. Caffeine and colaine are drugs that excite the central nervous system. It has been determined that a bottle of 340 grams of cola-type drinks contains 50 to 80 mg of caffeine. If you drink more than 1 gram of caffeine at a time, it will lead to central nervous system excitement, manifested as restlessness, rapid breathing, muscle tremors, tachycardia, extra-period contractions and insomnia, blurred vision, tinnitus and so on. Even if you take less than 1 gram, due to the irritation of the gastric mucosa, you will experience symptoms of toxicity such as nausea, vomiting, dizziness, palpitations and precordial pain. The fetus is particularly sensitive to caffeine, which can quickly pass through the placenta and act on the fetus, causing the fetus to be adversely affected. Injecting caffeine into pregnant rats, it has been confirmed that rats are prone to cleft palate, meningeal bulge, spina bifida, jawlessness, eyelessness, skeletal abnormalities, dwarfism, limb deformities and other phenomena. For the health of the next generation, pregnant women should be cautious or prohibited from drinking coffee and cola-type drinks. 11, drinking alcohol Research shows that pregnant women drinking alcohol is an important cause of infant malformations and mental retardation. This is because any trace of alcohol can pass through the placenta and enter the fetus unhindered, making the fetus body alcohol concentration and the mother’s alcohol concentration as well. A French medical doctor observed 127 children born to women with alcohol addiction and found that they all had common defects: single eyelids, even if double eyelids were not obvious, flat nose, eyelids turned out in the inner corner of the eyes, flat and narrow face, blurred nasal groove, thin and tight upper lip, and short chin. This kind of alcohol poisoned, facially stunted children account for about 1/3 of children born to mothers who drink alcohol. more serious is the harm alcohol does to the brain and heart, with about 30% of babies suffering from heart disease as a result of pregnant women’s alcohol consumption. It is not uncommon for pregnant women to drink too much alcohol and have their children die soon afterwards. Autopsies of dead babies show that their brains are not only smaller than normal, but are also underdeveloped or significantly malformed. Many countries have conducted intelligence tests on children poisoned by alcohol during fetal life and found that their IQs were below the average level, with most of them being unresponsive, mentally retarded or idiotic.