Physiology
Textbooks
Boundless Anatomy and Physiology
Human Development and Pregnancy
Physiology Textbooks Boundless Anatomy and Physiology Human Development and Pregnancy
Physiology Textbooks Boundless Anatomy and Physiology
Physiology Textbooks
Physiology

Section 2

First Week of Development

Book Version 29
By Boundless
Boundless Anatomy and Physiology
Physiology
by Boundless
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4 concepts
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Fertilization

Fertilization occurs when a sperm and an egg have fused together to form a zygote, which begins to divide as it moves towards the uterus.

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Cleavage of the Zygote

The process of cleavage is the step of embryogenesis where the zygote divides to produce a cluster of cells known as the morula.

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Blastocyst Formation

The blastocyst forms early in embryonic development and has two layers that form the embryo and placenta.

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Implantation

Implantation is the very early stage of pregnancy at which the embryo adheres to the wall of the uterus and begins to form the placenta.

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