Classicly

Sex in Education; or, A Fair Chance for Girls is a women's health book written by Edward Hammond Clarke was an American physician.

Author's Preface:

About a year ago the author was honored by an invitation to address the New-England Women's Club in Boston. He accepted the invitation, and selected for his subject the relation of sex to the education of women. The essay excited an unexpected amount of discussion. Brief reports of it found their way into the public journals. Teachers and others interested in the education of girls, in different parts of the country, who read these reports, or heard of them, made inquiry, by letter or otherwise, respecting it.

Various and conflicting criticisms were passed upon it. This manifestation of interest in a brief and unstudied lecture to a small club appeared to the author to indicate a general appreciation of the importance of the theme he had chosen, compelled him to review carefully the statements he had made, and [6]has emboldened him to think that their publication in a more comprehensive form, with added physiological details and clinical illustrations, might contribute something, however little, to the cause of sound education.