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The adult group includes parous and nulliparous rats in equal numbers. Therefore the total number of rats in the adult group was twice the number of rats in the prepubertal and pubertal groups. PND denotes postnatal day. Adult rats were pregnant at PND97 with an average of 21 gestation days (GD) and 28 lactating days (LD) from delivery to weaning of the pups.
