The first atretic
females were also found at age 2.
oocytes were found in samples throughout the year, except February, in ovaries of various maturity phases.
On the basis of their histological characteristics, atretic
oocytes were allocated to either the [alpha] or [beta] stages, by using the criteria of Hunter and Macewicz (1985).
losses of oocytes are another possible bias in estimating potential fecundity.
These can be distinguished by the presence of brown bodies or atretic
oocytes, which are typically products of prior spawning (e.
In September, oocytes in ovaries are in the atretic
stage (10) indicating the end of the spawning season.
follicle becomes an androgenic follicle by default because atretic
follicles are deficient in aromatase activity.
Oocyte stage categories were 1) previtellogenic, 2) early vitellogenic, 3) vitellogenic, 4) ovulatory and 5) atretic
eggs are older and usually incapable of being fertilized.
1 mg/kg of ZEA, the developing primordial follicles were observed in the cortex, oocytes became bigger and had a regular shape with oval or round, but no atretic
follicle (green arrows) was present.
A CT angiogram of the brain revealed chronic occlusion of the right sigmoid sinus collateralizing to an atretic
right internal jugular vein (Figure 2).
Cell density was dependent on oocyte quality, with mature oocytes (metaphase II oocytes-MII) presenting more surrounding cumulus cells (16073 [+ or -] 2595 cells) than atretic
(AT; the oocyte suffers atresia) and degenerated oocytes (DEG: the oocyte degenerated and only cumulus cells and sometimes the zona pellucida are present; 7737 [+ or -] 1547 cells; p = 0.
Most females from Penghu, Beimen, and Putai had few free-laying degenerating oocytes; the number of atretic
oocytes varied from 2-3 to 10-15 cells per field of vision (Fig.
The numbers of primary, secondary follicles, Graphian and atretic
follicles and corpus leuteum were counted in all groups by optic microscopic.
Covered stents were preferred in patients having aneurismal dilatation, PDA association and atretic