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. 2011 Apr 18;119(8):1070–1076. doi: 10.1289/ehp.1002741

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F₁ female mammary gland development. Mammary whole-mounts illustrate morphology representative of treatment groups at PNDs 22, 42, and 63 (n = 6–7 females/treatment/age). Bars = 1,000 μm for PND22 and 2,000 μm for PND42 and PND63.