从人体的新陈代谢来说,人体所需要的脂肪、蛋白质、碳水化合物三大营养素可以相互转化,以满足人的基本的需要,因此,许多长期素食的人仍然十分健康。但是孕妇由于胎儿生长发育和孕妇自身的需要,仅靠素食就不能满足人体与胎儿的需要了,必须从膳食中得到足够的营养物质。孕妇营养的好坏,不仅直接影响胎儿的生长及脑细胞的发育,而且对婴儿的智力发育也至关重要。孕妇膳食中营养素不足,胎儿就要吸收母体中的钙、铁、蛋白质及营养素,致使孕妇发生营养缺乏病,如常见的贫血、骨质软化症等。另外,孕妇营养不良容易引起流产、早产、死产、胎 From the body’s metabolism, the body needs three nutrients, fat, protein, carbohydrates can be transformed into each other to meet the basic needs of people, so many people who are long-term vegetarians are still very healthy. However, due to the growth and development of pregnant women and their own needs of pregnant women, vegetarians alone can not meet the needs of the human body and the fetus, and must get enough nutrients from the diet. The quality of nutrition in pregnant women, not only directly affect the fetal growth and brain cell development, but also essential for the baby’s intellectual development. Pregnant women lack of nutrients in the diet, the fetus should absorb the mother of calcium, iron, protein and nutrients, resulting in nutritional deficiencies in pregnant women, such as common anemia, osteomalacia and so on. In addition, malnutrition in pregnant women easily lead to miscarriage, premature birth, stillbirth, fetal