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.

primary oocyte

an oocyte that has begun but not completed the first maturation division. It is derived from an oogonium by differentiation near the time of birth.

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 ?
The mechanism whereby the LH surge liberates the primary oocyte from meiotic arrest is quite elegant and involves structural changes in the relationship between the oocyte and cells of the cumulus oophorus that send cytoplasmic projections through the zona pellucida (Figure 11-11).
Compared with the control group reduction at the number of primary oocytes and structural deformities were
Secondary follicle An ovarian follicle that consists of the primary oocyte encased in a translucent membrane, called the zona pellucida, surrounded by two or more layers of follicular cells.
5h, arrow); RVPOs (187-200 [micro]m), and smaller new vitellogenic primary oocytes (NVPOs) (<100 [micro]m), the latter resulting from recent oogonial mitosis (Fig.
In addition, females can resorb their developing primary oocytes when nutritionally stressed (Lecoq 1975, Sundberg et al.
We identified a single intersex fish, and it contained a small number of primary oocytes in the perinucleolar stage surrounded by testicular tissue.
0 Follicles are elongated and often isolated in abundant connective tissue with walls consisting of primary oocytes of homogeneous size.
The number of mature oocytes in the ovarioles changes with time as the primary oocytes in the ovarioles are laid and the secondary oocytes mature: the time required for oocyte development is determined in part by available resources.
Resting Ovary containing small primary oocytes and oocytes with perinuclear nucleoli (<0.
Red abalone became sexually differentiated at approximately 50 mm when primary oocytes or spermatocytes (or sperm) are first observed in the gonad tissue.
Free sperm are readily observed in proximity to primary oocytes in light-microscope squash preparations of the posterior oviduct (Fig.

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