Prior to Title IX, many professional fraternities were all male and most professional sororities/women's fraternities were all female. Several of these professional fraternities and sororities even considered themselves both professional and social organizations because they often emphasized the social aspects of their activities. During the ensuing years since the enactment of Title IX, single-sex professional fraternities and sororities became coeducational to conform to Title IX. Several organizations simply opened their membership both men and women. For example, Phi Chi (medicine) opened membership to women in 1973; Phi Beta (music and speech) opened membership to men in 1976; and Delta Omicron (music) opened membership to men in 1979. A few single-sex groups merged with other organizations, such as Phi Delta Delta, a women's professional law fraternity, merged with Phi Alpha Delta (law) in 1972.