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目的:评价孕期补充推荐铁摄入量60mg/d是否远远超过合成血红蛋白最大浓度的铁需要量。方法:受试对象从孕14周开始每日补充60mg铁和40μg叶酸。药片服用量通过计数瓶内的剩余药片来确定。在孕14周和30周利用瑞典HEMOCUE血红蛋白分析仪测定Hb水平(n=868)。剂量-反应关系通过SES、
OBJECTIVES: To evaluate whether the iron supplementation recommended during pregnancy 60 mg / d far exceeds the iron requirement for maximum hemoglobin concentration. METHODS: Subjects were supplemented with 60 mg iron and 40 μg folic acid daily for 14 weeks. The amount of pills taken is determined by counting the remaining pills in the bottle. Hb levels were measured at 14 weeks and 30 weeks of gestation using a Swedish HEMOCUE hemoglobin analyzer (n = 868). Dose-response relationship through SES,