Fertilization in its broadest sense refers to the various steps leading to and resulting in sperm-egg fusion. Fertilization is a process, which can last 20 or more hours (as in salmonids) although it is much shorter in most other fish. Fertilization in its narrow sense refers to the fusion of female and male pronucleus1. Synonyms of fertilization are fecundation and impregnation whereas the term insemination denotes the bringing together of seminal fluid with eggs.
KeywordsPolar Body Sperm Head Cytoplasmic Streaming Animal Pole Perivitelline Space
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