embryo fetal development

What are the Major Stages of Fetal Development?

The major stages include:
Pre-embryonic stage (first two weeks): The fertilized egg undergoes rapid cell division and implants in the uterine wall.
Embryonic stage (third to eighth week): Major organs and structures begin to form. This is a critical period for exposure to toxins.
Fetal stage (ninth week to birth): Organs grow and mature, and the fetus gains weight and size.

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