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Fertilization occurs when a sperm meets and penetrates an egg. This process is also called fertilization.
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The Period of the Zygote begins at conception and ends when the fertilized egg implants in the mother's uterus. This period can last from 10 to 14 days.
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An embryo is a multicellular diploid eukaryote in its earliest stage of development, from the time of first cell division until birth, hatching, or germination
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All the babys muscles and organs have formed. The mother has gained 2-4 pounds and feeling nausea and fatigue.
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