An atretic follicle is a degenerated ovarian follicle that has failed to mature and become a viable egg. During the menstrual cycle, many follicles begin to develop, but typically only one reaches full maturity; the rest undergo atresia, a process where they break down and are reabsorbed by the body. Atretic follicles are characterized by changes in their structure, including the collapse of the follicular wall and loss of oocyte viability. This process is a normal part of follicular development and ovarian function.
Follicle development occurs in several stages: primordial follicle, primary follicle, secondary follicle, preantral follicle, antral follicle, and mature (Graafian) follicle. Each stage involves specific changes in the follicle and oocyte as they mature towards ovulation.
graafian follicle
Graafian follicle
Follicle.
The FSH hormone or follicle stimulating hormone
The increase in levels of follicle-stimulating hormone (FSH) that occurs at puberty stimulates the maturation of a primary follicle in the ovary. FSH acts on the granulosa cells of the primary follicle, promoting their proliferation and differentiation. This leads to the growth and development of the primary follicle into a secondary follicle.
濾胞 /ro hou/ (ovarian follicle) and 毛嚢 /mou nou/ (hair follicle).
Follicle-stimulating hormone (FSH) is the hormone that stimulates follicle development in the ovary. It is produced by the pituitary gland and plays a key role in the menstrual cycle of females.
the hair follicle is a skin organ that produces hair.
The hair follicle is an inolentation of the Epidermis.
primary follicle/oocyte
The FSH hormone or follicle stimulating hormone