This book investigates the scientific validity of treating the human brain as an androgynous organ by examining evidence for structural and functional differences between the sexes. Cynthia L. Darlington, a researcher in the field, addresses the historical bias in neuroscience where male subjects have dominated laboratory experiments and clinical trials. She argues that excluding females from research due to hormonal variability creates a significant flaw in medical application, as these findings are subsequently generalized to the entire population. The text provides a rigorous examination of biological data to challenge the assumption of neurological uniformity.

Experts and academics recognize this work as a critical intervention in the discourse surrounding sex-based research biases in medicine. Readers frequently note the balance between accessible prose for the layperson and the substantial scientific data provided for the professional researcher.