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通过对210例孕妇及其所生婴儿的调查证明:孕妇血清钙离子浓度自妊娠早期开始下降,有些病例降至正常值以下。母血钙低于正常的现象出现越早,所生婴儿出现佝偻病的时间也越早;母亲妊娠时血钙低于正常者婴儿易患佝偻病。
Surveys of 210 pregnant women and their babies have shown that serum calcium levels in pregnant women have dropped since early gestation and some have dropped below normal. Maternal calcium is lower than the normal phenomenon appeared earlier, the birth of rickets in children born earlier; maternal pregnancy serum calcium lower than normal infants susceptible to rickets.