Figure 1.
The studies inclusion and exclusion procedures.
Table 1.
Characteristics of the association studies on maternal MTHFRC677T polymorphism and the risk of Neural tube defects (NTDs).
Figure 2.
Forest plot of NTD risk associated with the maternal MTHFR C677T polymorphism (TT+CT vs. CC) in overall populations.
Table 2.
Summary of comparisons for maternal MTHFRC677T polymorphism and risk of Neural tube defects (NTDs).
Figure 3.
Begg's Funnel plot of NTD risk associated with the maternal MTHFR C677T polymorphism (TT vs. CC +CT) in overall populations.
Each point represents a separate study for the indicated association.