1, animal liver. Animal liver is rich in nutrition, contains a variety of vitamins and some trace elements, and is a real tonic in life. However, in the first three months of pregnancy, if pregnant women eat animal liver, not only can they not supplement nutrition, but they may cause fetal malformation.

2. Fry, fry and smoke food. Some pregnant women like to eat some high-temperature fried foods before pregnancy, such as fried dough sticks and mutton kebabs. After pregnancy, although I paid attention, I still couldn't quit. It is worth noting that in high-temperature fried foods, most of them will add some carcinogens, which are toxic to both the mother and the embryo. After pregnant women eat it, it will not only affect the fetus, but also affect their own health.

3. Caffeine-containing foods. The first three months of pregnancy belong to the first trimester. During this period, pregnant women should stay away from caffeinated foods, such as coffee, tea and chocolate. Caffeine is a central stimulant, and people get excited easily after eating caffeinated food. If pregnant women eat too much caffeinated food, fetal movement will increase and even affect the growth and development of the fetus.

4. Allergic food. Before pregnancy, pregnant women may know that they are allergic to certain foods, but they will still eat a little to satisfy their desire. After pregnancy, you must not eat food that you know will be allergic, otherwise a series of allergic reactions will easily occur in the body, which will produce some harmful substances and affect the growth and development of the fetus.

5. Pickled food. In life, common pickled foods are sausages, ham, pickles, bacon and so on. Many people like to eat them. However, a lot of salt will be added to these foods during the curing process, which will easily increase the burden on pregnant women's kidneys after eating them.

6, irritating food. Some pregnant women are not spicy and unhappy before pregnancy, but still like to eat some spicy food after pregnancy, and even have the habit of drinking. In fact, spicy and irritating food will stimulate the stomach and cause mucosal edema, hemorrhoids in pregnant women may be aggravated, and alcohol may lead to fetal malformation.