The male reproductive system is both internal
        and external

Sperms are produced in the testis situated inside the scrotum. Their production starts from puberty and is continuous. Sperm production is controlled by the hormones FSH and LH from the pituitary gland in the brain.

  Sperms as seen under a microscope

As sperm mature, they pass from the testis through the coiled channels of the epididymis, an organ that stores and nourishes the sperm as they develop. Although sperm have tails when they

enter the epididymis, normal movement ( motility ) is acquired only after 18-20 hours within the epididymis. The entire process of sperm formation to maturation takes approximately 72 days.


It takes sperm about 14 days to travel through the epididymis. From the epididymis, the sperms move into the vas deferens, a tubal structure that connects the epididymis with the seminal vesicles via a common ejaculatory duct.

The seminal vesicles are pouch like glands that produce the majority of the fluid seen during ejaculation.

Mature sperms remain in the vas deferens (in the widened upper end called the ampulla) until the man ejaculates, or expels fluid from his penis during intercourse.

As the man ejaculates, sperm combines with fluid from the seminal vesicles and with a thick secretion from the prostate gland thus causing semen. The semen is deposited into the woman's vagina.