They were classified as follows : primordial follicle (an oocyte surrounded by one layer of flattened granulosa cells), primary follicle
(an oocyte surrounded by one layer of cuboidal granulosa cells), secondary follicle (diverse layers of cuboidal granulosa cells without antral space), tertiary follicle (diverse layers of cuboidal granulosa cells with antral space), and Graafian follicles (presence of cumulus and granulosa and theca cell layers).
Semi-quantitative scoring method was employed to evaluate Gal-1 and Gal-3 immunolocalization in many parts of diabetic rat ovary, such as epithelium, tunica albuginea, cortex, cortical blood vessels, medulla, fibroblast-like cells, primordial follicles, primordial follicle cells, primary oocytes, primary follicle
, primary follicle
cells, zona pellucida, theca interna, theca externa, secondary follicles, granulosa cells, antrum, corona radiata and culumus (Tables I and II).
An ovarian follicle consisting of an oocyte surrounded by a layer of cuboidal follicular (granulosa) cells.
Growth differentiation factor-9 (GDF9) is a family member of transforming growth factor-[beta] (TGF[beta]) and is expressed by oocytes at a primary follicle
stage and controls of gene expression in granulosa cells.
Multi-layer primary follicle
(Multilaminar) in the experimental groups receiving different amounts of tarragon extract (500,1000 and 2000mg/kg B.W) is not significantly different than the control group (Figure 3).
(FI) as an oocyte completely surrounded by a single/double layer of cuboidal epithelium with zona pellucida in between.
Secondary and tertiary follicles are also seen developing from the primary follicle
all of which may have a different level of differentiation.
A stimulating effect of activin-A on goat primary follicle
development in vitro was also demonstrated by SILVA et al.
The comparison of the values found in the present work for the mean diameter of primordial follicle (16.0 [+ or -] 2.0 [micro]m and 20.8 [+ or -] 2.2 [micro]m), primary follicle
(50.2 [+ or -] 5.5 [micro]m and 59.6 [+ or -] 7.2 [micro]m), and antral follicle (626.0 [+ or -] 161.4 [micro]m and 821 [+ or -] 110.6 [micro]m) are within the same range of values with those reported by Mayor et al.
Just before ovulation, a primary follicle
containing a primary oocyte grows and eventually divides.
The primary follicle
has a single layer of cuboidal cells surrounding the egg.
Generally, studies on ovary development are focused on primordial follicle formation and transition into primary follicle
. Gilt fecundity is determined at the time when the fetal primordial follicle pool is established, while any abnormalities in the formation of primordial follicles can result in infertility .