EARLY PRENATAL DEVELOPMENT
Individuals mark their phenomenal existence on the planet from a fertilized oocyte. This fertilized oocyte is the product of fertilization. Fertilization is a complex multistep process where the sperm (male gamete) meets an ovum (female gamete) and forms a zygote.
The regulated coordination of the organ systems in an animal’s body is well assisted by different organs, tissues, and cells of considerable diversity that are derived from a single cell lineage, namely the fertilized oocyte. The intrauterine development is initiated at fertilization with the formation of a zygote. Zygote develops into a 2-cell embryo followed by the first post-fertilization mitosis. Within the cytoplasm of the oocyte, the nucleus of the sperm undergoes enlargement to form the male pronucleus (Lee et al., 2003).3.3
Source:
Rana Tanmoy (ed.). Principles of Veterinary Animal Physiology. CRC Press,2026. — 290 p.. 2026
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