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大多数人认为,为了孩子的需要,孕妇补充营养多多益善。其实,这是认知上的一个误区。从医学角度讲,营养缺乏和营养过剩都可能给孕妇和胎儿带来不好的影响。 比如,在怀孕初期,维生素A的缺乏有可能造成胎儿眼部神经发育不良,但是过量了又可能造成中枢神经系统病变,导致胎儿畸形。又比如,怀孕初期钙摄入量过高,有可能造成胎盘钙化而导致胎儿发育不良甚至流产,所以并不是
Most people think that for their children’s needs, pregnant women are more nutritious. In fact, this is a cognitive misunderstanding. From a medical point of view, nutritional deficiencies and overnutrition may have adverse effects on pregnant women and fetuses. For example, in early pregnancy, vitamin A deficiency may cause fetal eye neurodevelopment, but excessive and may cause central nervous system diseases, leading to fetal malformations. Another example is the early pregnancy calcium intake is too high, may cause placental calcification and lead to fetal malformation or abortion, so it is not