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Definition of Oogenesis

Oogenesis: The process of egg formation.

The second "o" in oogenesis is pronounced separately from the first: o·o·gen·e·sis. The word was created from the prefix "oo-" (Greek oon, egg) + "genesis" (the coming into being of something) = the coming into being of the egg (the ovum).

Oogenesis is in contrast to spermatogenesis, the process of sperm formation.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=20231
Last Editorial Review: 6/14/2012

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