In a group of 1,756 gynecological patients married for at least one year, three-quarters of whom were being treated for sterility, the relationship between age at menarche and the frequency of orgasm during coitus was examined. Statistical analysis revealed a close correlation between these two factors: in orgastic women, r = -0.878; in patients with rare or no orgasm, r = +0.914; and in persons with sexual dissatisfaction r = +0.722. The percentage of orgastic women decreased, and the number of patients with rare or no orgasm during coitus or with sexual dissatisfaction increased with advancing age of menarche.