I love how the author is using a science basis to support her position. I love how many commenters are agreeing that science should be used to make decisions. However, even a cursory examination of the link provided [although I'm confident the author has many more, she is a trained phD in neuro], reads [from the authors of the paper] "The mechanisms by which sex differences in the mammalian brain arise are poorly understood,..." AND "Despite extensive investigation looking at the direct effects of chromosome complement4,5,6,7, gonadal hormones and epigenetic influences8,9,10,11,12 on the developing brain, there is a paucity of information that has addressed the multifaceted role of these factors on the progenitor cells that generate the central nervous system—neural stem cells (NSCs)." This is a reminder to all that stating "research shows.." is vague position. Extrapolating results from a model organism to the human condition is likely to mislead.