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 ?
According to HE staining of slices of the right ovary, it was found that the ovarian tissue was destroyed and there were few structurally complete follicles and abundant atretic follicles in the 0 mg/kg curcumin group compared to the normal control [Figure 1];[Table 3].
Indeed, atretic follicles were observed in all classes of transitioning fish: early, mid, and late.
Scores of 1 +, 2 +, 3 + and 4 + were, respectively, considered for atretic follicles with 25, 50, 75 and 100 percent positivity for lipid staining.
On the other hand, group C reported higher count of atretic follicles and corpora lutea in comparison to controls.
Sections were examined by using calibrating ocular graticule for the number and diameter of primary, antral and atretic follicles and number and size of the ovarian cysts, by the method described earlier.
No mature follicles were found in the left ovary, and a small amount of mature and atretic follicles were identified in the right ovary.
Macrophages cluster around atretic follicles and are involved in their clean up of the atretic follicles.
Town Creek females exhibited atretic follicles beginning in January and throughout the study.
BPA causes slowing down of oogenesis increase in the number of atretic follicles and connective tissue in the ovaries besides discontinuation in growth of developing follicles and start of follicle breakdown.
During autumn, many atretic follicles began to appear and the pre-vitellogenic follicles began to increase in number again (Figure 8).
In the ovarian sections, the number of atretic follicles and regressing corpus luteum that retained at least one caspase-3-positive cell was counted and divided by the total number of follicles and corpus luteum, respectively, in order to calculate the incidence (percentage) of follicular atresia and luteal regression.