Unverified83% confidenceDecision RuleTime unknown
孕早期(前3个月)胎儿铁需求低且孕吐严重,一般无需大剂量补铁;铁需求高峰在孕中晚期(20周后)胎儿造血和储铁阶段,此时应加强
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83%
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Long-term
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Unverified孕早期(1-12周)胎儿铁需求尚低,若无贫血一般无需专门补铁,过量铁反而加重妊娠反应;孕中晚期(20周后)血容量扩张、胎儿储铁需求增加,是补铁的关键窗口期97% similarUnverified孕早期(前3个月)孕吐严重时无机铁易加重恶心,不建议此阶段强行补高剂量铁;缺铁性贫血高发于孕中晚期(20周后血容量扩张),补铁重点应放在孕中期开始96% similarUnverified孕期铁需求分阶段:孕早期(前12周)胎儿需求低,过量铁易加重孕吐和便秘;孕中晚期血容量扩张需求激增至27mg/天,应选择可分阶段调整或中晚期铁含量足够的产品,而非孕早期就高铁猛补93% similarUnverified孕早期(前3个月)铁需求增加不明显且孕吐严重,无贫血者不必强补铁;孕中晚期血容量扩张、胎儿储铁需求上升是补铁重点期93% similarUnverified孕早期(前12周)不建议盲目大剂量补铁,此时多数孕妇铁储备尚足,过量铁反而加重孕吐并有氧化应激风险,铁需求高峰在孕中晚期(20周后)93% similar
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