TOWNVILLE – Veterinarian Erika Berr squinted into her visor where an ultrasound image appeared from a probe she’d placed in a pregnant cow. On the fuzzy picture she measured the diameter of the embryo’s eyes.
“One eye is roughly 12 millimeters,” Berr said. “What does that give us for a date?”
Berr’s assistant, Clemson pre-vet graduate Alissa Byars, checked a chart Berr had prepared, showing the relationship between the South Poll baby’s eye size and her development.
“98 days,” Byars said.
“Perfect.”
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The Post and Courier’s Education Lab focuses on issues and policies affecting South Carolina’s education system. It is supported by donations and grants to the nonprofit Public Service and Investigative Fund, whose contributors are subject to the same coverage we a

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