PRL and sexual dysfunction: Interestingly, in pre- and post-menopausal women seeking medical advice for sexual dysfunction the lowest PRL quartile ranged 5.12–6.53 ng/ml [75], corresponding to the second PRL quartile in men with sexual dysfunction [47], thus suggesting a potential gender difference in the biochemical definition of hypoprolactinemia, as already recognized for normoprolactinemia [61].