Serum prolactin levels were measured in 48 consecutive sexually dysfunctional women who presented to a sexuality clinic. The prevalence of hyperprolactinemia and mean prolactin level of this group were compared to a control group (blood donor volunteers) of 93 women. One woman in the study group (2.1%) was hyperprolactinemic (serum prolactin greater than 15 micrograms/L). However, the differences in both prevalence of hyperprolactinemia and mean prolactin levels, between groups, were not statistically significant. Neither were differences found in mean prolactin levels among subgroups of women in different diagnostic categories and in those with single vs. multiple diagnoses. Nonetheless, because hyperprolactinemia is readily treatable, we would recommend prolactin determinations in sexually dysfunctional women, particularly in those with associated reproductive irregularity or in whom organic etiology is clinically suspect.