For the average person, the diet needs to be nutritious and balanced, ensuring one egg, two or two red meats, three fruits, 500 ml of dairy products, one pound of leafy greens, moderate amounts of staple foods and fish, plus 1.5 liters of plain water per day. The above recipes also apply to pregnant women. But for pregnant women, just to do the above is not enough, but also need to pay attention to the following points: 1, reasonable supplementation of multivitamin preparations, folic acid, to reduce the incidence of neural tube malformations. The multivitamin preparations are Aleve, Maternal, Fosfom, etc., and the folic acid preparations are Silien. If you are already taking such pregnancy vitamins as Aleve, you do not need to supplement folic acid alone, because the pregnancy vitamins already contain enough folic acid. 2. Prevent calcium deficiency. It is important to ensure the intake of calcium during pregnancy to prevent calcium deficiency. The best way to supplement calcium is to consume dairy products, such as milk, yogurt, cheese or soy milk. If you can ensure 500-800ml of dairy products per day, the calcium intake will be able to meet the needs of both the mother-to-be and the baby. Only consider taking calcium tablets if the dairy intake is not enough. To prevent calcium deficiency, it is not enough just to take calcium supplements, but also to ensure daily sun exposure for more than 1 hour. However, hormonal changes during pregnancy cause the skin to stay spotted especially easily, so pay attention to the sunscreen of the face when sunbathing. 3.Increase the intake of water. The average person needs to consume 50ml/kg of water every day, shaving off the water in fruits and meals, and should consume an additional 1.5 liters of plain water. During pregnancy because of the extra baby, to excrete increased metabolic waste, so the mother-to-be needs to increase the intake of water, generally 2 to 3 liters. After delivery because to breastfeeding, it is recommended that the daily intake of water for 3 ~ 4 liters. 4.Prevent constipation. The uterus increases in early pregnancy and the fetal head drops in late pregnancy, which will compress the rectum and easily lead to constipation, so pay attention to adjusting the diet structure during pregnancy to prevent constipation: try to eat more dietary fiber and coarse grains, such as celery, corn, grapefruit, bananas, etc.; appropriate exercise, daily walking or brisk walking in about 1 hour. Exercise during pregnancy can promote the intestinal peristalsis of pregnant women, but also to avoid the accumulation of energy and excessive weight gain during pregnancy. If it still does not work, you can take maternal lactulose suitable for taking. 5, reasonable control of weight gain during pregnancy. Weight gain during pregnancy should be controlled at about 12.5Kg (20-30 pounds or so). How much weight gain is appropriate during pregnancy depends on the mother-to-be’s pre-pregnancy body mass index, body mass index (BMI) = weight (kg) divided by the square of height (m), BMI = 18.5 to 25 is normal, reaching 25 is overweight, more than 30 is obese. If the weight belongs to the normal range, it is advisable to gain 11.3 to 15.8 kg during pregnancy; overweight people should gain 6.8 to 11.3 kg; obese people should gain preferably 5.0 to 9.0 kg; those who do not meet the weight standard should gain slightly more, 12.7 to 18.1 kg. Excessive weight gain can lead to unstable blood sugar, giant babies, delivery difficulties, and increased cesarean section rates. The weight gain of pregnant women in China often exceeds the standard, and the rising rate of cesarean section in China is not unrelated to the excessive weight gain of pregnant women and the increase of the proportion of huge babies.