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在严格的质量保证措施下，对北京石景山地区２７０名孕妇及其婴儿进行了血铅的追踪调查。结果显示：孕３月血铅水平为４５．０μｇ／Ｌ，分娩前血铅水平为６４．８μｇ／Ｌ，孕期血铅呈升高趋势，其中后３月升高明显，分娩前血铅约为孕３月血铅的１．５倍；脐带血铅水平为５１．９μｇ／Ｌ，其中有１０．４％的胎儿脐血铅高于１００μｇ／Ｌ；婴幼儿血铅随月龄增加呈升高趋势，６月龄后升高明显。相关分析显示：妊娠３月血铅与妊娠６月血铅之间、分娩前血铅与脐带血铅之间、脐带血铅与婴幼儿血铅之间均有显著相关关系（Ｐ＜０．０１），其中分娩前血铅与脐带血铅之间、６月龄血铅与１２月龄血铅之间的相关系数分别为０．８０、０．４７。作者对孕期血铅升高及婴幼儿血铅随月龄升高的原因进行了分析。
Under strict QA measures, 270 pregnant women and their infants in Shijingshan district of Beijing were surveyed for blood lead. The results showed that blood lead level was 45.0 μg / L in pregnancy and blood lead level was 64.8 μg / L before delivery, blood lead level increased during pregnancy, especially in the latter three months. Blood lead level before delivery was about 3 months pregnant with blood lead 1.5 times; umbilical cord blood lead level 51.9μg / L, of which 10.4% of fetal cord blood lead higher than 100μg / L; infant blood lead increased with increasing age Trend, after 6 months of age increased significantly. Correlation analysis showed that there was a significant correlation between the levels of blood lead in maternal blood and blood lead levels in 6 months of pregnancy, blood lead levels and umbilical cord blood before delivery, and blood lead levels in infants and young children (P <0.01) ), Among which the correlation coefficients between blood lead and umbilical cord blood before delivery, blood lead at 6 months and blood lead at 12 months were 0.80,0.47 respectively. The author of the blood lead during pregnancy and infants with elevated blood lead levels were analyzed.