How Long Does It Take for Sperm to Regenerate?

Click here to learn about how long it takes sperm to generate, a process known as spermatogenesis.

Your body generates new, mature sperm approximately every 65 days on average, though the process can take shorter or longer depending specific variables. This process is known as spermatogenesis and lasts from sperm production throughout its maturation.

Your testicles produce several million sperm cells each day, leaving you with up to 8 billion sperm at the end of each production cycle. While at face value these numbers seem enormous, milliliter of semen only contains about 200 million sperm cells. This constant system of production ensures that your body always has a fresh supply of sperm when you need it.

The sperm regeneration process includes three steps. First, sperm cells with a full set of paired chromosomes (diploid cells) divide in half, forming what’s called haploid spermatids. The spermatids carry a single set of genetic material, 23 chromosomes. This is so that they can fuse with an egg (which also has 23 chromosomes) to form a diploid cell.

Next, hormones help the sperm develop within your testicles until they mature into what’s called spermatids. Once they’re almost mature, they move into the epididymis, a tube connected to your testicles that stores sperm. In the epididymis, the spermatids develop into mature spermatozoa, which gain motility and have the ability to swim to an egg cell. They spermatozoa are preserved in the epididymis until ejaculation.