Gender system can be understood as a cultural system rooted in biological differences. Semiotically speaking, it is a binary sign system (male/female) with some variation involved (transsexuals, homosexuals, etc.). In the process of modernity, the biological motivation of the gender system is being loosened by technological innovations such as contraception and mother's milk substitute. At the same time, the state has replaced family and kin as the organizing structure of society and the cultural ideal of equality has gained a strong (...) position. These and similar changes together have made gender flow in ‘post-traditional’ societies. The paper deals with this process in paying attention to the three theoretically possible constellations in the determination of semiotic identities in social process: functional order in Parsonian sense, formation of struggling parties in the sense of Weber and Bourdieu, and anomie in the sense of Durkheim and Berger and Luckmann. It turns out that elements of all of these three theoretical constellations are present in the current transformation of the gender system. This is elaborated with empirical material drawn from the change of the Finnish gender system from the 1950s to the 1990s. (shrink)