The process of embryogenesis begins with an egg or ovum being fertilized by a sperm cell to form a zygote. The zygote is a single diploid cell, which will ultimately multiply through mitotic division ...

Zygote Body is a comprehensive and unique way to learn about the human body. The human body is fascinating and complex. Students puzzle over those different bones, blood vessels, muscles, and ...

Human pregnancy lasts approximately 40 weeks. It can last anytime between 36 and 42 weeks after fertilization and still be considered a normal timeframe. An egg becomes fertilized when a sperm ...

Early stage embryos created by IVF. New work reveals the key genes that cause the kickstart development of the embryo. (Getty Images). New work by scientists in the U.S. and China shows how a ...

American Journal of Botany, Vol. 62, No. 2 (Feb., 1975), pp. 105-115 (11 pages) This investigation begins with the late zygote and traces ultrastructural development to the late globular stage of the ...