As part of the male reproductive system, the prostate gland’s main purpose is to secrete a slightly alkaline fluid that forms part of the seminal fluid. This is the fluid that carries sperm. During male climax (orgasm), the muscular glands of the prostate help to propel the prostate fluid, in addition to sperm that was made in the testicles, into the urethra. The semen then leaves the body out through the tip of the penis during ejaculation.