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Figure 1 | BMC Pregnancy and Childbirth

Figure 1

From: Folic acid supplementation, dietary folate intake during pregnancy and risk for spontaneous preterm delivery: a prospective observational cohort study

Figure 1

Prevalence of folic acid and vitamin A supplementation during pregnancy. Prevalence of folic acid and vitamin A supplementation during pregnancy (Q1 and Q3 data) in women with spontaneous non-preterm (37+0-42+6 weeks, n = 51,141) or preterm delivery (22+0-36+6 weeks, n = 1,755) among 66,014 participants in the Norwegian Mother and Child Cohort Study (2002 – 2009).

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