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Morphometric ratios examining the brain size of fetuses at the time of necropsy (45 to 47 DPI, corresponding with a gestational age of 81 to 89 days). Morphometric ratios were calculated from fetal measurements and compared between infected (blue) and control groups (red): (a) The relative brain weights (brain as a percentage of body weight plotted against total body weight); (b) Cranial circumference plotted against crown-rump length, used to evaluate proportional head size.
