atretic follicle

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Related to atretic follicle: corpus albicans, secondary follicle

a·tret·ic fol·li·cle

(ă-tret'ik fol'i-kĕl)
A follicle that degenerates before coming to maturity; many atretic follicles occur in the ovary before puberty; in the sexually mature woman, several are formed each month.
Synonym(s): corpus atreticum.

atretic follicle

An ovarian follicle that has undergone degeneration or involution.
See also: follicle


being in a state of atresia; without an opening.

atretic follicle
an ovarian follicle in an undeveloped state due to immaturity, poor nutrition or systemic disease; manifested by prolonged anestrus.


a sac or pouchlike depression or cavity.

atretic follicle
an involuted ovarian follicle.
conjunctival follicle
focal accumulations of hypertrophied lymphoid tissue in conjunctiva, indicative of an inflammatory reaction.
cystic follicle
ovarian follicle that has not ruptured, is grossly enlarged, may be multiple and on both ovaries. Caused by insufficient luteinizing hormone. Affected cows may be nymphomaniac in behavior, but most are anestrous and anovulatory. See also cystic ovarian degeneration.
dental follicle
the structure within the substance of the jaws enclosing a tooth before its eruption; the dental sac and its contents.
dominant follicle
in the ovary, hormones secreted by the largest follicle will cause others to regress.
gastric follicle
lymphoid masses in the gastric mucosa.
graafian follicle
a maturing ovarian follicle among whose cells fluid has begun to accumulate, leading to the formation of a single cavity and leaving the ovum located in the cumulus oophorus; called also vesicular ovarian follicle.
hair follicle
see hair follicle.
hemorrhagic follicle
see corpus hemorrhagicum.
lymph follicle, lymphatic f
1. a small collection of actively proliferating lymphocytes in the cortex of a lymph node.
2. a small collection of lymphoid tissue in the mucous membrane of the gastrointestinal tract; such collections may occur singly (solitary lymphatic follicle) or closely packed together (aggregated lymphatic follicles).
ovarian follicle
the ovum and its encasing cells, at any stage of its development.
primary ovarian follicle
an immature ovarian follicle consisting of an immature ovum and the few specialized epithelial cells surrounding it.
primordial follicle
an ovarian follicle consisting of an ovum enclosed by a single layer of cells.
sebaceous follicle
a hair follicle with a relatively large sebaceous gland, producing a relatively insignificant hair.
solitary follicle
1. areas of concentrated lymphatic tissue in the mucosa of the colon.
2. small lymph follicles scattered throughout the mucosa and submucosa of the small intestine. Called also solitary glands.
thyroid follicle
discrete cystlike units filled with a colloid substance, constituting the lobules of the thyroid gland.
vesicular ovarian follicle
graafian follicle.
wool follicle
site of origin of wool fiber.
References in periodicals archive ?
05) decrease in GC dissociation on day 43, while in other sizes of atretic follicles GC dissociation increased in the test groups compared to the control-sham groups (Figure 1).
05) increase in atretic follicles (<100 [micro]m) with floating GCs in the antrum on day 23 in comparison to the control-sham group.
Follicles between 201-300 [micro]m in diameter showed the highest rate of oocyte deformation in atretic follicles in the test groups.
Late transitional CO and PO no longer present, however pockets of large atretic follicles are still notable.
Average atretic follicles significantly increased in diabetic rats compared to other groups show (05/0> p) (Table 2).
The change in ovarian function and pathological changes such as increasing and becoming Sekoulareh ovarian granulose cell necrosis, fibrosis and vacuolization so they are one of the causes of atretic follicles and pathological changes of diabetes based on the hypothalamus-pituitary--gonadal that low levels of gonadotropins and ovarian cell sensitivity to these hormones is [5].
Atretic follicles were seen in all the three groups.
There were no type 2 atretic follicles in all the groups.
A significant increase was found in the mean number of atretic follicles of type 3 a and 3b in the controls and the treated group compared to the initial control.
Alpha atretic follicles (Hunter and Macewicz, 1985b) were identified in biopsy samples taken with a Pipelle de Cornier[R] (Prodimed, Neuilly En Thelle, Picardie, France), a flexible, plastic tube 2.
In the first case the standing stock of atretic follicles (Ia) was measured as prevalence (proportion of fish containing alpha atretic follicles) and relative intensity (Ia/whole body weight g) as described previously (Witthames and Greer-Walker, 1995).
Atretic follicles were rather easily identified in unstained whole mounts and their morphology could be equated to that seen in histological section (Fig.