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In addition, follicles that have formed an antrum are called antral follicles or Graafian follicles. Definitions differ in where this shift occurs in the staging given above, with some stating that it occurs when entering the secondary stage, [ 2 ] and others stating that it occurs when entering the tertiary stage.
An antral or secondary follicle, also known as Graafian follicle and tertiary follicle, is an ovarian follicle during a certain latter stage of folliculogenesis. Definitions differ in where the shift into an antral follicle occurs in the staging of folliculogenesis, with some stating that it occurs when entering the secondary stage, [ 1 ] and ...
CCs primarily support growth and development of the oocyte whereas MGCs primarily serve an endocrine function and support the growth of the follicle. Cumulus cells aid in oocyte development and show higher expression of SLC38A3, a transporter for amino acids, and Aldoa, Eno1, Ldh1, Pfkp, Pkm2, and Tpi1, enzymes responsible for glycolysis. [ 7 ]
Download as PDF; Printable version ... and remain attached to the zona pellucida after the ovulation of the Graafian follicle. ... 18404loa – Histology Learning ...
The rise in FSH levels recruits five to seven tertiary-stage ovarian follicles (this stage follicle is also known as a Graafian follicle or antral follicle) for entry into the menstrual cycle. These follicles, that have been growing for the better part of a year in a process known as folliculogenesis, compete with each other for dominance. [5]
The larger ovarian follicles consist of an external fibrovascular coat, connected with the surrounding stroma of the ovary by a network of blood vessels, and an internal coat, which consists of several layers of nucleated cells, called the membrana granulosa. It contains numerous granulosa cells.
The theca folliculi comprise a layer of the ovarian follicles. They appear as the follicles become secondary follicles. The theca are divided into two layers, the theca interna and the theca externa. [1] Theca cells are a group of endocrine cells in the ovary made up of connective tissue surrounding the follicle.
The follicular antrum is the portion of an ovarian follicle filled with follicular fluid. Appearance of the follicular antrum during follicular maturation is the first sign that a follicle has reached the next stage of maturation. It has changed from a primary follicle to a secondary follicle.