How Many Sperm Are Produced in the Testes Each Day?

A man produces millions of sperm cells each day. These tiny cells develop inside the testicles in a system of tubes called the seminiferous tubules. During puberty, these cells transform into sperm, which have a head and a tail like tadpoles and carry genetic material.

The body stores sperm in the long tube called the Epididymis until ejaculation. A normal sperm count is 15 million sperm per milliliter of semen.


While we often talk about eggs and how their quality changes with age, sperm are also an important factor in fertility. On average, a male produces millions of new sperm each day. However, the number of sperm produced each day can change drastically depending on your hormone levels, age and other health factors.

The testicles are the primary reproductive organs of most mammals. The testes produce sperm and male sex hormones (androgens) in a process known as spermatogenesis. The sperm cells are stored in the epididymis, which is a series of ducts behind the testicles that store and carry sperm until sexual arousal.

Male children are born with a testis and a spermatic cord, which connects the testis to the scrotum. The testis contains two structures called lobes, and one of these is usually enlarged to become the penis. The other lobe is typically smaller and is called the epididymis, which is responsible for storing and transporting sperm until sexual arousal.

The testes are surrounded by a structure called the tunica albuginea, which protects and supports the seminiferous tubules. These tubules are filled with undeveloped sperm-producing cells called spermatogonia and supportive cells known as Sertoli cells. During puberty, these simple cells undergo a complex series of transformations to develop into mature sperm cells. These cells are arranged in close contact with Leydig cells that secrete testosterone. The entire process, from stem cells to mature sperm, takes about 74 days on average.

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When FSH and LH are released in the body, cells within structures called seminiferous tubules inside your testicles produce sperm. They start as simple round cells and undergo a process called spermatogenesis, which turns them into mature sperm cells that have half the number of chromosomes found in normal body cells. Immature sperm cells leave the seminiferous tubules and enter a long tube-like structure in your scrotum called the epididymis, where they remain until you’re ready to ejaculate.

The epididymis is divided into a head section and a tail. The head section has a thick pseudostratified columnar epithelium that can be felt as a bump under the skin, and the tail is covered by shorter stereocilia, which reabsorb seminal fluid to concentrate it and help sperm get started. The sperms stay in the epididymis until you’re ready to use them, and once you do they are pushed through another tube-like structure called the vas deferens, which leads into the urethra, the tube that carries urine out of the body.

Your sperm cells need to be able to move in order to get to the egg, and once they’ve been ejected during sexual arousal they are pumped through the vas deferens at an incredible rate, traveling all the way from the epididymis into the urethra in just over five minutes. Once in the urethra, they pick up other fluids secreted by glands in your penis, including a sugary substance that helps them act like rocket fuel. The resulting mix is known as semen, and it contains anywhere from 20 to 300 million sperm cells for every milliliter of liquid.

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Sperm Storage

Men create tens of millions of sperm cells on a daily basis. The testicles store these sperm until they are ready to be released in a process called ejaculation. The sperm are stored in a tube called the epididymis, which is a long, thin, curved duct that runs from the testicles to the vas deferens and then into the urethra. Once in the vas deferens, the sperm must move forward with the help of muscle contractions to reach and fertilize an egg. Once they get to the end of the vas deferens, the remaining sperm cells will either break down or be reabsorbed by the body. Men can improve their chances of conception by timing their sex to occur close to or after ovulation.

One ejaculation can contain anywhere from 20 million to 300 million sperm. Men can also improve their sperm by eating more fruit, fish oils, walnuts, edamame beans and dark chocolate, as well as getting plenty of exercise. In addition, reducing stress and avoiding foods high in fat can help boost sperm quality.

While we often talk about women’s fertility and how their egg quality decreases with age, men are fertile throughout their entire adult lives. This is because the testicles are constantly producing new sperm through a process known as spermatogenesis, which takes about 64 days to complete.

Sperm Transport

During a typical day, millions of sperms are produced in the testicles. They are ejected in each ejaculation, traveling through the epididymis and vas deferens until they reach the uterus and fertilize an egg. Sperm have to face a lot of danger during this process, but they must succeed. Normally, a man produces 290 million sperm cells each day, but only one of them can successfully reach the egg and fertilize it.

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The testicles have a system of tubes called seminiferous tubules that house germ cells, which hormones — including testosterone, the male sex hormone — cause to mature into spermatozoa. The spermatids develop a head and tail, which help them swim through the fluid that carries them. This fluid is known as semen, and it has a slippery, jelly-like texture. It also contains alkaline fluids that protect the sperm from the acidic environment of the female reproductive tract.

Once sperm leave the testicles, they go to the epididymis, which is a long tube behind the testicles that helps in sperm storage and transport. During this time, sperms gain motility, which allows them to travel when they get ejected during a sexual act.

When a man ejaculates, it usually contains 20 to 300 million sperm cells per milliliter of semen. Typically, around 4% of sperm will have normal morphology, which means they can swim through the female reproductive tract to fertilize an egg. However, a person can have sperm with abnormal morphology, which is known as teratozoospermia.

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