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Maternal folate and vitamin B 12 deficiency predict poor pregnancy outcome. To improve pregnancy outcomes in rural area of China, we investigate rural women's folic acid supplementation (FAS) status and the associations between maternal vitamin B status during the first trimester and subsequent adverse pregnancy outcomes. We collected the questionnaire information and drew 5 ml of blood from 309 early pregnant rural women. The birth outcomes were retrieved from medical records after delivery. Out of the total, 257 had taken FAS, including 50 before conception (group A) and 207 during the first trimester (group B). The concentration of plasma folate and the RBC folate supplementation groups were obviously higher than that of no-supplementation group (group N, p &lt;0.01). The mean vitamin B 12 levels in FAS group were significantly higher than those in groups N and B ( p &lt;0.05). Women who delivered SGA or premature infants had reduced plasma folate levels ( p &lt;0.05) compared with controls. The multiple linear regression models revealed that RBC folate levels affected the infant birth weight ( p &lt;0.01) and birth length ( p &lt;0.05). In conclusion, FAS can significantly improve plasma folate and RBC folate levels in childbearing-age women and reduce the risk of subsequent adverse pregnancy outcomes.

journal of clinical biochemistry and nutrition

Periconceptional folic acid supplementation and vitamin B&lt;sub&gt;12&lt;/sub&gt; status in a cohort of Chinese early pregnancy women with the risk of adverse pregnancy outcomes