Plasma prolactin levels in male homosexuals

Plasma prolactin values of 20 male homosexuals of Kinsey rating 6 were compared with plasma prolactin values of 15 male heterosexuals of Kinsey rating 0. There was no difference in mean plasma prolactin value between the two groups. These findings are at variance with those reported by Kolodny et al. Kolodny, R. C., Jacobs, L. S., Masters, W. H., Toro, G., and Daughaday, W. H. (1971a). Plasma gonadotrophins and prolactin in male homosexuals. Lancet2, 18–20] in which plasma prolactin was found to be elevated in individuals of Kinsey rating 6 as compared to heterosexual controls. The present investigation, therefore, fails to confirm a relationship between sexual orientation in males and plasma prolactin level.