Sex and gender: you should know the difference
The term “gender selection” is used inappropriately to describe the determination of embryonic sex chromosomes. Gender is socially and culturally determined, and therefore the correct term is “sex determination” or “sex selection.”
Volume 107, Issue 6, Pages 1294–1295
Darcy E. Broughton, M.D., Robert E. Brannigan, M.D., Kenan R. Omurtag, M.D.
Embryos do not have a “gender”; rather, they have a “sex.” Gender refers to social and cultural distinctions between sexes, not biological ones. An embryo's “maleness” or “femaleness” should therefore be defined by its biological sex (i.e., sex chromosome pair).