Iron and folate supplements should be given routinely during pregnancy to prevent maternal anaemia.

妊娠期间应当定期补充铁和叶酸以预防孕产妇贫血。

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The researchers also verify that at baseline, the groups did not differ in their use of multivitamin supplements, intakes of total folate, vitamin B6, and vitamin B12, or cancer history.

研究者还证实，两组在多种维生素的补充，摄入叶酸、维生素b6、B12的总量，或患癌史方面的基线水平相同。

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The researchers also verify that at baseline, the groups did not differ in their use of multivitamin supplements, intakes of total folate, vitamin B6, and vitamin B12, or cancer history.

研究者还证实，两组在多种维生素的补充，摄入叶酸、维生素b6、B12的总量，或患癌史方面的基线水平相同。

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