The function of the prostate is to secrete a slightly alkaline fluid, milky or white in appearance, that in humans usually constitutes roughly 30% of the volume of semen along with spermatozoa and seminal vesicle fluid. Semen is made alkaline overall with the secretions from other contributing glands, including, at least, seminal vesicle fluid. The alkalinity of semen helps neutralize the acidity of the vaginal tract, prolonging the lifespan of sperm. The prostatic fluid is expelled in the first part of ejaculate, together with most of the sperm. In comparison with the few spermatozoa expelled together with mainly seminal vesicular fluid, those in prostatic fluid have better motility, longer survival, and better protection of genetic material.

The prostate also contains some smooth muscles that help expel semen during ejaculation.

Visual laser ablation of the prostate in high-risk patients with sampling for histopathology (V-LAP) 
Visual laser ablation of very large prostate
Visual laser ablation of the prostate (V-LAP)
Endoscopic Balloon Procedure