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Schedule of RF-EMF exposure. Sprague–Dawley (SD) rats were exposed to RF-EMF for a total of 9 weeks. In brief, 10-week-old female proestrus rats were screened using an Impedance Checker after mating with 10-week-old male rats. Accurate calculation of whole-body SARs allowed the exposure of RF-EMF under the following conditions: one dam per cage from mating to birth, one dam and eight pups per cage from birth to weaning, and four pups after weaning.
