女性在怀孕期间对钙的需求量增加。因为补充钙质可维持血钙的平衡,而血钙平衡对孕妇和胎儿都很重要,它既是胎儿生长发育的必需,又是防范孕妇发生妊娠高血压综合征(妊高症)的重要举措之一。早在20世纪50年代,国外学者通过调查发现,在膳食中钙摄入量高的国家和地区,妊高症的患病率偏低,反之则升高。例如,在危地马拉,孕妇平均每日摄钙量达1100毫克,妊 Women’s demand for calcium increases during pregnancy. Because calcium supplementation can maintain the balance of blood calcium, and calcium balance in pregnant women and fetuses are important, it is both necessary for fetal growth and development, but also to prevent pregnancy-induced pregnancy-induced hypertension (pregnancy-induced hypertension) an important measure one. As early as the 1950s, foreign scholars found through surveys that the prevalence of pregnancy-induced hypertension is low in the countries and regions with high calcium intake in the diet, and vice versa. For example, in Guatemala, pregnant women average daily intake of calcium up to 1100 mg