oogenesis

(redirected from Oocyte maturation)
Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to Oocyte maturation: oogenesis, primary follicle

oogenesis

 [o″o-jen´ĕ-sis]
the development of mature ova from oogonia. adj., adj oogenet´ic.

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]

oogenesis

(ō′ə-jĕn′ĭ-sĭs)
n.
The formation, development, and maturation of an ovum.

o′o·ge·net′ic (-jə-nĕt′ĭk) adj.

oogenesis

Embryology The process of ♀ gamete formation

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]
Enlarge picture
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

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.

oogenesis

or

ovogenesis

the process of GAMETE production in female DIPLOID (2) animals. see GAMETO GENESIS.
References in periodicals archive ?
Oocyte maturation: Emerging concepts and technologies to improve developmental potential in vitro.
In overall, nuclear maturation is only observed morphologically which are required for proper arrangement of sequence of IVM, and cytoplasmic maturation delivers clear evidence about the achievement of oocyte maturation (Hsu et al., 2014).
When follicles reaching a size greater than critical threshold were detected, final oocyte maturation was achieved under the effect of hCG.
We hypothesized that chronic pain negatively affects oocyte maturation by generating stress-induced changes.
Nader said: "In basic terms, we need mPR to be delivered to the right place which is the plasma membrane, to allow progesterone-mediated oocyte maturation to produce mature eggs that can be fertilized for a new life to begin.
Final oocyte maturation was triggered with 2 ampoules of 0.1 mg of subcutaneous Triptorelin (Decapeptyl, Ferring) when three leading follicles achieved [greater than or equal to]17 mm diameter.
In conclusion, our study suggests that the reduction of GDF9 and BMP15 expression starting from the primary follicle stage can cause follicular development disorders and insufficient oocyte maturation that can further lead to subfertility or infertility.
Although success rates were low in initial IVM studies, with improved regimes and protocols, the rates of oocyte maturation, fertilization, and implantation have been significantly improved [4, 6].
(25) Also, folate has antioxidant properties that counteract reactive oxygen species (ROS) which affect oocyte maturation, ovulation, luteolysis, and follicle atresia.
Based on the microscopic diagnosis of the germ lineage, cysts with a batch of oogonia surrounded by prefollicle cells, pachytene oocytes, primary growth oocytes, early and late secondary growth oocytes, a full-grown oocyte (Figure 2 and Table 1) and oocyte maturation (Figure 3J) were recognized in S.