Fig. 1From: Effect of L-arginine and sildenafil citrate on intrauterine growth restriction fetuses: a meta-analysisRandom-effetcs meta-analysis comparing birth weight between control groups and L-aginine groups. The test for heterogeneity was not significant (P = 0.91),the standardized mean difference significantly favors controls (0.41, 95 % CI [0.24, 0.58], P < 0.0001)Back to article page