copulatory plug

biology

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Last updated

July 19, 2026

Quick Summary

The term "copulatory" relates to or is used in copulation, which is the reproductive act where the male reproductive organ enters the female reproductive tract to fertilize an egg. This process involves specific adaptations in animals, including the development of reproductive organs like testes and ovaries, as well as copulatory organs such as the penis in mammals.1234

In mammals, the penis is an erectile organ that facilitates the transfer of sperm. Following copulation, a temporary structure called a copulatory plug may form in some species. This plug, made of secretions from the male reproductive tract, can help prevent sperm leakage and potentially reduce the chances of fertilization by other males.1

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reptile
Courtship and fertilization
…the deposition of a mucous copulatory plug. Male garter snakes (Thamnophis) deposit this plug into the female’s cloaca at the end of copulation. The plug prevents any other mating and remains for a day or two.
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…the deposition of a mucous copulatory plug. Male garter snakes (Thamnophis) deposit this plug into the female’s cloaca at the end of copulation. The plug prevents any other mating and remains for a day or two.
Read More