Sperm production is hormonally driven. Brain hormones govern sperm production and are precisely controlled. The hypothalamus secretes gonadotropin-releasing hormone GnRH , which acts on the anterior pituitary gland, stimulating it to release follicle stimulating hormone FSH and leutinizing hormone LH. FSH and LH are released into the bloodstream and act only on the testes to encourage spermatogenesis within seminiferous tubules action of FSH and testosterone production by neighboring Leydig cells action of LH between the seminiferous tubules Figure 1. The male genitalia consist of the scrotum, which houses the testicles and associated ducts the epididymis and vas deferens , and the penis Figure 2.
Male Reproductive System
Normal sperm count: A guide to semen analysis
Please understand that our phone lines must be clear for urgent medical care needs. When this changes, we will update this web site. Please know that our vaccine supply is extremely small. Sperm harvesting is entirely different from a diagnostic testicular biopsy because, in this setting, the goal is not to identify what is happening in the testis but instead it is to find sperm. Only men with no sperm in their ejaculate azoospermia need to have sperm retrieved directly from the testis or epididymis. This may involve a simple aspiration for men who have a blockage or require much more extensive sampling of the testis for men who have a sperm production problem.
Normal sperm count: Everything you need to know
You can't tell whether your sperm is healthy just by looking at it. You'll need to schedule an appointment with your doctor to find out for sure. But what you can do until that appointment rolls around is look at your lifestyle, because a healthier you generally makes for healthier sperm. It doesn't take forever to change the quality of your sperm.
Testicle or testis plural testes is the male reproductive gland or gonad in all animals, including humans. It is homologous to the female ovary. The functions of the testes are to produce both sperm and androgens , primarily testosterone. Testosterone release is controlled by the anterior pituitary luteinizing hormone ; whereas sperm production is controlled both by the anterior pituitary follicle-stimulating hormone and gonadal testosterone. Males have two testicles of similar size contained within the scrotum , which is an extension of the abdominal wall.