Human Development Process

The first stage of human development is fertilization, where a sperm cell from the father fuses with an egg cell from the mother to form a zygote.

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The embryonic stage lasts from the third week to the eighth week of pregnancy.

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During the embryonic stage, the major organs and structures of the body begin to form.

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The fetal stage is the period from the ninth week of pregnancy until birth, where the developing human is referred to as a fetus.

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A typical human pregnancy lasts about 40 weeks, or roughly nine months.

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The placenta provides oxygen and nutrients to the growing fetus and removes waste products from the fetuss blood.

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The heart starts to beat around the fifth week of pregnancy.

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The first trimester is crucial as it involves the formation of all major organs and structures, making it a critical period for healthy development.

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