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The process of fertilization, or conception, involves fusion of the nucleus of a male gamete (sperm) and a female gamete (ovum) to form a new individual.
Fertilization is taking place in multiple steps with the following order:
1. The penetration of the cumulus matrix by the spermatozoa
2. The adhesion and penetration of the zona pellucida by the spermatozoa
3. Fusion between the two membranes
4. Oocyte activation
5. Syngamy (formation of the nucleus of the zygote) Watch the lecture for detailed information.
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