Fig. 2
From: Initiation and duration of folic acid supplementation in preventing congenital malformations
Association between folic acid supplementation and risk of congenital malformations. Odds ratios for the risk of malformations were estimated in women with folic acid compared with those without supplementation after controlling for region, maternal age, ethnicity, parity, conception mode, education level, family income, history of adverse pregnancy outcomes, medicine exposure, and early pregnancy conditions