Human fertilization
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Human fertilization is the union of an egg cell and a sperm, occurring primarily in the ampulla of the fallopian tube. The result of this union leads to the production of a fertilized egg called a zyg
Fertilization and implantation in humans
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Zygote
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A zygote is a eukaryotic cell formed by a fertilization event between two gametes.
Zygote formation: egg cell after fertilization with a sperm. The male and female pronuclei are converging, but the genetic material is not yet united.