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. 2007 Nov 22;116(2):223–230. doi: 10.1289/ehp.10742

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Axis malformations and incidence of edema. (A) Lateral view of normal body axis in control NF stage 46 tadpole (top), and atrazine-exposed tadpoles exhibiting curved (middle) and severely shortened (bottom) axes. White arrows indicate edemas observed in the heart (middle) and gut (bottom) regions of atrazine-treated tadpoles. Bars = 1.0 mm. Incidence of axis malformations (B) and edemas (C) in tadpoles exposed to 10, 25, or 35 mg/L atrazine or vehicle (DMSO) from NF stage 41, 42, or 43 through NF stage 46. Sample sizes for (B) and (C) are same as in Figure 1.

**p < 0.001, and ^#p < 0.0001 as determined by post hoc pair-wise contrasts from logistic regression.