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Mean (±SEM) E2 (A) and progesterone (B) levels following administration of mecamylamine (3.0 mg/kg) in nicotine-treated intact females that were tested in the proestrus (n=12), estrus (n=12), metestrus (n=7), or diestrus (n=7) phase of the estrous cycle. Daggers (†). denote a significant difference from all other groups (p≤0.05).
