一个受精的卵子,重量仅为0.0000005克,经过“十月怀胎”,长成重达3000～3400克或更重一些的婴儿.短短的280天,体重增长6亿倍以上,这奇迹般的变化,就是从母体吸取了丰富营养的结果.因此,妇女妊娠期的营养,不仅关系到妇女本身的健康,而且关系到胎儿和婴儿的生长发育.一般来讲,一位从事轻体力劳动的孕妇,每日需要热量2500～2700千 A fertilized egg weighs only 0.0000005 grams, after “October pregnancy”, grow into weighing 3000 ~ 3400 grams or heavier baby .As long as 280 days, weight gain more than 600 million times, this miraculous Change is derived from the mother of nutrient-rich results, therefore, women’s nutrition during pregnancy, not only related to women’s health, but also related to the growth of fetuses and infants.Generally speaking, a pregnant woman engaged in light manual labor , Need daily calories 2500 ~ 2700 thousand