Aristotle inherited and propagated the Athenian view of the world wherein women were kept out of public and were thought to be merely the incubators of the masculine seed. However, if the coldness of the woman into which it is implanted overcomes the heat of the semen, this telos is frustrated, and the embryo becomes more material, i.e., a woman. Aristotle also claimed that women merely supplied the material cause for the fetus. Thomas Aquinas took this as the basis of his theory of sexuality. Just as God can perfuse matter with form, so can seminal power infuse form into the corporeal matter supplied by the mother.
Man produces the form, women supply the matter to be formed.
Aquinas saw the production of females as a defect in the production of men and viewed women as having as much claim to reason as a child or imbecile. They had not developed fully. Freud and other psychiatrists and psychologists similarly theorized that femininity was an immature stage of male development. The notion that women are almost-men whose development or evolution is truncated has a long history, and it is not gone from our thinking. Everybody has one X chromosome and is surrounded by a mother's estrogens during prenatal life.