 The prenatal hormone exposure referred to here is the flooding of androgens during fetal development prior to which the there is no sex differentiation between fetuses. The organizational hypothesis is that this same infusion of androgens that determines differential reproductive development also determines brain development and ultimately differential brain structure in males and females. Jordan-Young is particularly interested in how conclusions are drawn about sexuality from brain organization research. Her main concern about the uncritical use of the hormonal theory of brain organization is that alternative hypotheses—specifically the hypothesis that social factors, expectations, and learned behaviors play a role in brain organization—fail to be considered adequately.