primary oocyte


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Related to primary oocyte: secondary oocyte

pri·mar·y o·o·cyte

an oocyte during its growth phase and before it completes the first meiotic division.

pri·mar·y o·o·cyte

(prī'mar-ē ō'ō-sīt)
An oocyte during its growth phase and before it completes the first maturation division.

primary oocyte

an early stage in OOGENESIS.
References in periodicals archive ?
By the time of birth the oogonia enter the first meiotic prophase and are then referred to as primary oocytes. This phase of meiosis is completed only to the diplotene stage.
On the 4th day there were severe degeneration at primary oocytes. In addition decomposition at nucleoplasm was also detected (Fig.
Oogonia Primitive germ cells of the female that undergo mitotic divisions to give rise to primary oocytes.
4a-e; 11a), the ovarian germinal epithelium consists of somatic NPs and germ cells, including AOs; conical or gum drop-shaped RVPOs; and, occasionally, residual degenerating primary oocytes (DPOs).
Legends: Primary oocytes (PO), primordial follicle cells (PFH), zona pellucida (ZP), theca interna (TI), theca eksterna (TE), antrum (A), granuloza cells (GH), Secondary oocytes (PO), corona radiata (CR), cumulus oophorus (CO), Medulla (M).
Immature ovaries could be distinguished histologically from regenerating ovaries by the diameter of the primary oocytes (W.
All adults were in sexual (mating) and reproductive (oocyte development) diapause and the primary oocytes remained tiny and translucent in female ovaries (Fig.
In vitro maturation of bovine cumulus enclosed primary oocytes and their subsequent in vitro fertilization and cleavage.
Spawning was completed by September with greater than 90% of all individuals in Stage 1 development with primary oocytes. One male with regressing testes was identified from September collections.
In some individuals, ovaries contained only oogonia, but in other females at a more advanced stage of development and with larger ovaries, both oogonia and primary oocytes in the perinucleolar stage were present.

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