Pregnancy
38 weeks of human development from fertilization (conception) to birth.
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Embryo
"Growing within." During the first eight weeks of pregnancy, the developing human is called "embryo"
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Embryonic phase
The first eight weeks marked by the formation of most major body systems.
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Fertilization
The union of reproductive cells from a man and a woman. When the egg and sperm unite, a new individual is created.
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Fetus
Means "unborn offspring." From eight weeks until birth, the developing person is called a fetus.
Implantation
When the developing human implants into the uterine wall at 6 to 10 days after fertilization.
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Zygote
A fertilized egg, a single cell. In 24 to 36 hours after fertilization, the zygote compltes its first cycle of cell division.
Pregnancy
38 weeks of human development from fertilization (conception) to birth.
![]()
Embryo
"Growing within." During the first eight weeks of pregnancy, the developing human is called "embryo"
![]()
Embryonic phase
The first eight weeks marked by the formation of most major body systems.
![]()
Fertilization
The union of reproductive cells from a man and a woman. When the egg and sperm unite, a new individual is created.
![]()
Fetus
Means "unborn offspring." From eight weeks until birth, the developing person is called a fetus.
Implantation
When the developing human implants into the uterine wall at 6 to 10 days after fertilization.
![]()
Zygote
A fertilized egg, a single cell. In 24 to 36 hours after fertilization, the zygote compltes its first cycle of cell division.