Female ejaculation enhances reproductive success

Research on female ejaculation is scant. In recent years, scientists have assayed female ejaculate and discovered that, in addition to urine, an organ called the Skeen’s gland releases prostate-specific antigen (PSA). PSA in male ejaculate serves to fragment semenogelins and dissolve the seminal coagulum, enhancing sperm motility. The incidence of female orgasm is highly variable, with estimates ranging from 95% from self-stimulation to 50% during penile-vaginal intercourse. By contrast, the incidence rate of female ejaculation is even less well-understood and even more variable. Existing research suggests that female orgasm functions to enhance reproductive success by moving sperm in closer proximity to the egg as well as serves as a mate selection mechanism. We hypothesize that increased PSA paired with various substances from female ejaculation further enhances sperm motility and, therefore, conception. In addition to laying out the hypothesis for the possible adaptive function of female ejaculation, we propose several empirical questions derived from the hypothesis.