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Fetal skeletal anomalies: A and D, a fetus of the negative control group. B and E, a fetus showing acrania (dashed line), extracted from a female rat treated with 250 mg/kg of ASA. C and F, a fetus showing poor ossification of frontal, parietal and supraoccipital bones (arrows heads), extracted from a female rat treated with 1000 mg/kg of KACY.
