sperm-extrusion

Updated: May 4, 2025

Since, however, men and women have descended from remote ancestors who, in the manner of aquatic creatures, exercised functions of sperm-extrusion and germ-extrusion that were exactly analogous in the two sexes, without any specialized female uterine organization, the early stages of human male and female foetal development still display the comparatively undifferentiated sexual organization of those remote ancestors, and during the first months of foetal life it is practically impossible to tell by the inspection of the genital regions whether the embryo would have developed into a man or into a woman.

Havelock Ellis - Studies in the Psychology of Sex, Volume 5 : Erotic Symbolism; The Mechanism of Detumescence; The Psychic State in Pregnancy