Monospermy (/mɒnəʊˈspɜːrmi/) is a scientific term used to describe the fertilization of an egg by a single sperm cell. The word originates from the Greek language, where "mono" means one, and "sperma" means seed. The phonetic transcription of the word shows that the stress is on the third syllable, and the "spermy" part is pronounced with a long "e" sound. This term is commonly used in biology and reproductive medicine when discussing certain aspects of fertilization and reproductive health.
Monospermy is a term used in biology to describe the fertilization process in which only one sperm successfully penetrates and fertilizes an egg. Derived from the Greek words "monos," meaning "single," and "sperma," meaning "seed" or "sperm," monospermy refers to the phenomenon where a single spermatozoon unites with an ovum during sexual reproduction. This process occurs in various organisms across the animal kingdom, including humans.
During monospermy in humans, when a mature egg is released from the ovary and enters the fallopian tube, it is surrounded by a protective layer of cells known as the cumulus oophorus, which prevents multiple sperm from entering the same egg. Once the egg is reached by one sperm, it undergoes a series of biochemical changes called the acrosome reaction, enabling the sperm to penetrate the zona pellucida (the outer layer of the egg). Upon successful fusion of the sperm and egg, fertilization occurs, initiating the development of an embryo.
Monospermy is an essential mechanism to ensure the proper fusion of genetic material during fertilization, as multiple sperm entering the egg can lead to chromosomal abnormalities and developmental issues. This process is regulated by various mechanisms, including the presence of molecules on the surface of the egg that restrict the entry of multiple sperm. Monospermy plays a fundamental role in sexual reproduction, allowing for the initiation of embryonic development and the generation of diverse offspring in many species.
Fertilization through the entrance of one spermatozoon only into the egg.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The word "monospermy" is derived from two Greek roots: "monos" meaning "single" or "one", and "sperma" meaning "seed" or "offspring". In biology, "monospermy" refers to a type of fertilization in which a single sperm fertilizes an egg.