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Fertility is completely blocked in LET females. A) Percent of females successfully giving birth after being paired with a male for 10 days. B) Mean time to birth after introduction of a male breeder partner during the second fertility pairing after LET pellet had expired. C) Mean number of pups per litter in LET and CON mice during the second fertility pairing after LET pellet had expired. Significantly different from CON (*P < 0.05); n = 5–6/group.
