Infertility & Human Reproduction
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Infertility & Human Reproduction The Male Reproductive System In contrast to a woman’s monthly egg production cycle, men continuously produce sperm in the testes after puberty. Testosterone is also produced in the testes. The same hormones that regulate a woman’s reproductive cycle, LH and FSH, stimulate production of both testosterone and sperm in the man. The sperm leave the seminiferous tubules of the testis and travel through a tube called the epididymis, and then to the vas deferens where they mature. During ejaculation, they move to the ejaculatory duct, where the sperm mix with nutrient-rich fluids from the seminal vesicles and prostate gland. The combination of sperm and fluids is called semen. The semen provides a vehicle that allows sperm to travel outside the body. To fertilize an egg, a man needs to have sufficient amounts of normal sperm that are capable of traveling up through the woman’s uterus to the fallopian tubes.
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