The prostate is a compound tubuloalveolar gland found in the reproductive system of men. The prostate contains smooth muscles that help expel an alkaline substance in the semen during ejaculation. The alkalinity of semen helps neutralize the acidity of the vaginal tract, prolonging the lifespan of sperm.

The female prostate, like the male prostate, secretes PSA and levels of this antigen rise in the presence of carcinoma of the gland. The gland also expels fluid, like the male prostate, during orgasm.