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Epididymal spermatozoon and testicular spermatid counts in mice exposed to 7.5 kHz magnetic fields at 12 or 120 µT. To control for between-cohort differences in sperm counts, relative values (means±SEM) are shown in relation to the value observed in the sham-exposed group of each cohort. Means of sham-exposed animals are given as numerical values. N=20 (30 in sham-exposed group).
