Medical term:

oogenesis


oogenesis

 [o″o-jen´ĕ-sis]
the development of mature ova from oogonia. adj., adj oogenet´ic.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

o·o·gen·e·sis

(ō'ō-jen'ĕ-sis),
Process of formation and development of the oocyte.
Synonym(s): ovigenesis, ovogenesis
[G. ōon, egg, + genesis, origin]
Farlex Partner Medical Dictionary © Farlex 2012

oogenesis

(ō′ə-jĕn′ĭ-sĭs)
n.
The formation, development, and maturation of an ovum.
o′o·ge·net′ic (-jə-nĕt′ĭk) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

oogenesis

Embryology The process of ♀ gamete formation
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

o·o·gen·e·sis

(ō'ŏ-jen'ĕ-sis)
Process of formation and development of the oocyte.
Synonym(s): ovigenesis.
[G. ōon, egg, + genesis, origin]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
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OOGENESIS

oogenesis

(o?o-jen'e-sis) [? + genesis, generation, birth]
The developmental process by which the mature human ovum (the female reproductive cell) is formed. Formation begins during the first 3 months of female embryonic life with the development of ovarian follicles. Each follicle contains one oogonium which, through the process of mitosis, becomes a primary oocyte containing 46 chromosomes. The oocyte then undergoes the first meiotic reduction division, resulting in formation of a secondary oocyte and a polar body, each containing 22 autosomes (half the number of chromosomes that are found in nongerm cells) and one X heterosome. Further division is arrested in prophase until the female reaches puberty. The second meiotic division begins at ovulation and reaches metaphase where, once again, division is arrested until the ovum is fertilized. The second meiotic division is completed at fertilization, ending with formation of the mature haploid ovum and one polar body. Synonym: ovigenesis
See: illustration; meiosisoogenetic (-je-net'ik), adjective
Medical Dictionary, © 2009 Farlex and Partners

oogenesis

The production of egg cells (ova) in the ovaries and their preparation for release and fertilization. Oogenesis starts in the fetal ovary with the formation of OOGONIA. These divide by MEIOSIS to form OOCYTES.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

oogenesis

or

ovogenesis

the process of GAMETE production in female DIPLOID (2) animals. see GAMETO GENESIS.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

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