Mahalko J R, Bennion M
Am J Clin Nutr. 1976 Oct;29(10):1069-72. doi: 10.1093/ajcn/29.10.1069.
Values for hair chromium concentration of nulliparous women and parous women who had just given birth to a child were determined by atomic absorption spectrophotometry. Mean values for hair chromium concentration of nulliparous and parous subjects were 309 +/- 23 and 117 +/- 10 ppb, respectively. The difference was highly significant (P less than 0.001). No further significant decrease in hair chromium was observed in women who had borne more than one child. Hair chromium concentration increased significantly with the amount of time between pregnancies, especially when at least 4 years had passed since the end of the last pregnancy (P less than 0.001). These data suggest a state of suboptimal chromium nutrition during pregnancy.
通过原子吸收分光光度法测定了未生育女性和刚生育过孩子的经产女性头发中的铬浓度。未生育和经产女性头发铬浓度的平均值分别为309±23和117±10 ppb。差异非常显著（P<0.001）。生育过一个以上孩子的女性头发中的铬没有进一步显著下降。头发铬浓度随着两次怀孕间隔时间的增加而显著升高，尤其是自上次怀孕结束至少已过去4年时（P<0.001）。这些数据表明孕期铬营养处于次优状态。
