Development Animation - Pronuclear Fusion

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This animation shows the maternal and paternal pronuclei coming together following fertilization to form the first diploid cell, the zygote.

The process occurs within the zona pellucida (yellow), showing the three maternal polar bodies (green) generated by meiosis and the egg and spermatozoa nuclei (blue) loosing their nuclear membrane and the genomes combining.

Remember to use the control bar features if it plays too fast.

Source: UNSW Embryology Thanks to the late Prof William Larsen for allowing permission to use animations based on images from his textbook. (More? movie technical information)

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Cite this page: Hill, M.A. (2026, August 13) Embryology Development Animation - Pronuclear Fusion. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Development_Animation_-_Pronuclear_Fusion

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