A Reproductive Lexicon


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polar body

A polar body is the product of asymmetric cell division that occurs during meiosis. Both phases of meiosis produce a polar body, and the final result of completed meiosis is two polar bodies and one haploid egg. The formation of polar bodies allows the DNA content of the egg to be reduced while still maintaining critical stores of maternal components in the egg that are important for supporting future fertilization and pre-implantation embryo development.