In 2002, Emmanuele Jannini of L'Aquila University in Italy showed that there may be an explanation both for the phenomenon and for the frequent denials of its existence. Skene's glands vary in size from one woman to another, to the point where they appear to be missing entirely in some women. If Skene's glands are the cause of female ejaculation and vaginal orgasms, this may explain the observed absence of these phenomena in many women.
The clear or milky fluid that emerges (sometimes with force) during female ejaculation has a composition similar to the fluid generated in males by the prostate gland. The liquid is frequently mixed with urine that is sometimes released during the relaxation that occurs during orgasm, and with vaginal lubricating fluid.