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A '''human embryo''' is the first stage of human development.
A '''human embryo''' is the first stage of human development.
It is formed by the fusion of the male [[gamete]] (spermatozoon or "[[sperm]]") and female gamete ([[ovum]] or "egg"). This is called [[fertilization]] and usually occurs in the proximal portion of the female reproductive tract.
It is develops by cell multiplication of a zygote, formed by the fusion of the male [[gamete]] (spermatozoon or "[[sperm]]") and female gamete ([[ovum]] or "egg"). This is called [[fertilization]] and usually occurs in the proximal portion of the female reproductive tract.
== Controversies ==
== Controversies ==