Examlex
According to Freud, the second stage of psychosexual development is called the "____ stage."
Fertilization
The process of a sperm cell uniting with an egg cell, leading to the formation of a zygote and the beginning of pregnancy.
Zygote
The initial cell formed when a new organism is produced by means of sexual reproduction, following the union of male and female gametes.
Dizygotic Twins
Also known as fraternal twins, these are produced from two separate eggs fertilized by two different sperm cells.
Fertilized
The penetration of an egg by sperm, initiating the development of a new organism.
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