Where are sperm produced?
Jun 07, 2022
Source: Cainiu Health
Dr. Luo Yong
Introduction
Spermatogenesis begins with the differentiation of spermatogonial stem cells and ends with the formation of mature sperm. It takes approximately 45 days for spermatogonia to develop into morphologically mature, tadpole-shaped sperm; however, at this stage, the sperm are not yet fully mature and lack fertilizing capacity. They must be stored in the epididymis for a period of time to complete their final maturation process and acquire the ability to fertilize oocytes.
Sperm are produced in the seminiferous tubules of the testes.
The structure and overall function of the testes are regulated by endocrine glands in the hypothalamus and pituitary gland. In addition, local autocrine and paracrine regulatory mechanisms within the testes also play a crucial role in modulating spermatogenesis.
Spermatogenesis begins with the differentiation of spermatogonial stem cells and culminates in the formation of mature spermatozoa. Different types of germ cells are arranged in a highly organized, spatially specific pattern within the seminiferous tubules—this orderly progression constitutes the process of spermatogenesis.
It takes approximately 45 days for sperm to develop from spermatogonia into morphologically mature, tadpole-shaped spermatozoa. However, at this stage, the sperm are not yet fully functional and lack fertilizing capacity. They must be stored in the epididymis for an additional period—typically 30 to 50 days—to complete their final maturation and acquire the ability to fertilize an oocyte.
Therefore, the sperm ejaculated by a male began developing roughly three months earlier, attained their characteristic morphology about six weeks prior, and achieved full functional maturity shortly before ejaculation.
