While the spread of the word in science publications can be attributed to the influence of feminism, its use as a synonym for sex is attributed to the failure to grasp the distinction made in feminist theory, and the distinction has sometimes become blurred with the theory itself; David Haig stated, "Among the reasons that working scientists have given me for choosing gender rather than sex in biological contexts are desires to signal sympathy with feminist goals, to use a more academic term, or to avoid the connotation of copulation." In legal cases alleging discrimination, sex is usually preferred as the determining factor rather than gender as it refers to biology rather than socially constructed norms which are more open to interpretation and dispute.Julie Greenberg writes that although gender and sex are separate concepts, they are interlinked in that gender discrimination often results from stereotypes based on what is expected of members of each sex.
However, Money's meaning of the word did not become widespread until the 1970s, when feminist theory embraced the concept of a distinction between biological sex and the social construct of gender.The word was still widely attested, however, in the specific sense of grammatical gender (the assignment of nouns to categories such as masculine, feminine and neuter).According to Aristotle, this concept was introduced by the Greek philosopher Protagoras. To talk of persons..the masculine or feminine g[ender], meaning of the male or female sex, is either a jocularity (permissible or not according to context) or a blunder." and was popularized and developed by the feminist movement from the 1970s onwards (see § Feminism theory and gender studies below).Today the distinction is strictly followed in some contexts, especially the social sciences Later, in 2011, the FDA reversed its position and began using sex as the biological classification and gender as "a person's self representation as male or female, or how that person is responded to by social institutions based on the individual's gender presentation." The social sciences have a branch devoted to gender studies.Other sciences, such as sexology and neuroscience, are also interested in the subject.And those are exactly the types of claims researchers love putting to the test.