ovary follicle meansstages of folliculogenesis

  • Ovarian FolliculogenesisPubMed

    The ovary, the female gonad, serves as the source for the germ cells as well as the major supplier of steroid sex hormones. During embryonic development, the primordial germ cells (PGCs) are specified, migrate to the site of the future gonad, and proliferate, forming structures of germ cells nests, which will eventually break down to generate the primordial follicles (PMFs).

  • The role of estrogen in folliculogenesis — Monash University

    T1The role of estrogen in folliculogenesis. AUDrummond, Ann E. AUFindlay, Jock K. PY1999/5/25. Y11999/5/25. N2Gonadotrophins are fundamental to the mechanisms regulating follicle status and development. Follicles in the ovary are either quiescent or committed to one of two pathways growth or atresia.

  • Knockout of RNA Binding Protein MSI2 Impairs Follicle

    Characterizing the mechanisms underlying follicle development in the ovary is crucial to understanding female fertility and is an area of increasing research interest. The RNA binding protein Musashi is essential for post-transcriptional regulation of oocyte maturation in Xenopus and is expressed during ovarian development in Drosophila. In mammals Musashi is important for spermatogenesis and

  • Ovary and Follicle DevelopmentYale University

    Ovary and Follicle Development. Learning Objectives. Explain the regular progression of follicular development and atresia occurring in a cyclic fashion in the primary ovary Describe the role of FSH and LH in driving follicular development. Diagram how estrogen

  • Folliculogenesis and ovulationgfmer.ch

     · FOLLICULOGENESIS AND OVULATION. The ovaries, like the testicles, exert a double function, exocrine and endocrine, consisting of the production of gametes, the oocytes, as well as sex hormones, estrogens and progesterone. Whereas in the testicles the two functions are assured permanently from puberty onwards by two different structures, however

  • Knockout of RNA Binding Protein MSI2 Impairs Follicle

    Characterizing the mechanisms underlying follicle development in the ovary is crucial to understanding female fertility and is an area of increasing research interest. The RNA binding protein Musashi is essential for post-transcriptional regulation of oocyte maturation in Xenopus and is expressed during ovarian development in Drosophila.

  • Ultrastructural analysis of folliculogenesis in the ovary

    Ultrastructural analysis of folliculogenesis in the ovary of the yellow spotted stingray, Urolophus jamaicensis. Author links open overlay panel W.C. Hamlett * M. Jezior ** R. Spieler *** Show more.

  • Lhx8 regulates primordial follicle activation and

     · follicle activation, and LHX8 is an important oocyte-specific transcription factor in the ovary for regulating postnatal folliculogenesis. Keywords Lhx8, Primordial follicle, Oocyte, Lin28a, Ovarian reserve Background Following the proliferation of primordial germ cells, oogonia enter meiosis circa embryonic day 13 (E13.5)

  • Germ-Somatic Cell Interactions Are Involved in

     · Ovarian follicle assembly and folliculogenesis. (A) The ovarian follicles are regulated by germ–somatic cell interaction. When this communication is disrupted, follicle assembly is impaired, leading to early follicle reserve loss (Irx3/5 Nobox, Notch2) or

  • The regulatory role of Dicer in folliculogenesis in mice.

     · The regulatory role of Dicer in folliculogenesis in mice. Lei L (1), Jin S, Gonzalez G, Behringer RR, Woodruff TK. (1)Department of Obstetrics and Gynecology, Northwestern University, Chicago, IL 60611, USA. Dicer is the ribonuclease III for synthesis of mature functional microRNAs (miRNAs), which play an important role in regulating cell

  • Expression and localisation of c-kit and KITL in the adult

     · The c-kit/kit ligand (KITL) signalling axis is an essential component of ovarian folliculogenesis in mammals, but little is known about expression and localisation of its key components in the ovaries of reproductive age women. This study aimed to characterise mRNA expression of c-kit and KITL isoforms and the localisation of c-kit and KITL proteins in adult human premenopausal ovaries.

  • Ovary Follicle Developmentan overview ScienceDirect

    Although most of the studies of initiation of follicle development have taken place in experimental animals, results from the little work that has been done in human ovary suggest that similar phenomena prevail in the activation and growth of human preantral follicles. 52,61–63 What is clear is that the morphological changes that characterize initiation of follicle growth in rodents

  • Folliculogenesis and morphometry of oocyte and follicle

    This study was designed to describe, both quantitatively (morphometry) and qualitatively (histological differentiation), follicle and oocyte growth in the feline ovary. The ovaries of 43 cats were collected and processed for histology. The diameters of 832 follicle/oocyte pairs were measured, with and without zona pellucida (ZP), and a special emphasis was placed on the study of early

  • Kit-ligand/stem cell factor induces primordial follicle

    Initiation of folliculogenesis through the induction of primordial follicle development in the ovary has an important role in determining the fertility and reproductive fitness of most mammalian species. The factors that control this critical process are largely unknown. The hypothesis tested in the

  • Follicle dynamics visualization and analysis of follicle

     · induction and suppression of folliculogenesis both in in vivo andinvitroexperiments[4, 5]. However, to our best knowl-edge, follicle dynamics has never been visualized in real time. A follicle consists of the oocyte and two types of somatic cells surrounding the oocyte, the granulosa and theca cells, which play principal roles in steroidogenesis.

  • Folliculogenesis and Morphometry of Oocyte and Follicle

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  • Folliculogenesis and Morphometry of Oocyte and Follicle

     · Contents This study was designed to describe, both quantitatively (morphometry) and qualitatively (histological differentiation), follicle and oocyte growth in the feline ovary. The ovaries of 43 cats were collected and processed for histology. The diameters of 832 follicle/oocyte pairs were measured, with and without zona pellucida (ZP), and a special emphasis was placed on the study of

  • Removal of mouse ovary fat pad affects sex hormones

     · but the LH receptor increased in ovary fat pad-removed mice. These results suggest that ovary fat pad is important for mouse reproduction. Introduction The normal folliculogenesis is a basis of high-quality oocyte formation. Follicle development starts during neonatal life when primordial follicles are formed in rodents.

  • "Investigating the role of Spondin 1 in ovarian

    Folliculogenesis is the ovarian process in which a follicle, consisting of an oocyte surrounded by granulosa cells (GCs), theca cells, a fluid-filled antrum, and a basal lamina separating GCs from TCs, grows and differentiates, culminating in development of a fertilizable oocyte. TCs under the influence of luteinizing hormone (LH) produce androgens.

  • The bone morphogenetic protein system and the regulation

     · In addition, by controlling the expression of PAPP-A in granulosa cells, BMP-15 and FSH play a role in the selection of the dominant follicle and oocyte maturation (Wu et al., Reference Wu, Wang, Chen, Zhu, Dong, Sheng, Xu and Huang 2012). Table 7 summarizes the effects of BMP-15 on oogenesis and folliculogenesis in the different mammalian species.

  • Ultrastructural analysis of folliculogenesis in the ovary

    Ultrastructural analysis of folliculogenesis in the ovary of the yellow spotted stingray, Urolophus jamaicensis. Author links open overlay panel W.C. Hamlett * M. Jezior ** R. Spieler *** Show more.

  • Folliculogenesis and Morphometry of Oocyte and Follicle

    Folliculogenesis and Morphometry of Oocyte and Follicle Growth in the Feline Ovary K Reynaud1, C Gicquel1, S Thoumire1, M Chebrout1, C Ficheux1, M Bestandji1 and S Chastant-Maillard1,2 1UMR 1198

  • Capitalizing on transcriptome profiling to optimize and

     · The somatic cell transcriptome from group follicle culture reflects dynamic expression of known and novel regulators of folliculogenesis. The group follicle culture system presented here and

  • Regulation of androgen receptor signaling by

    Although chronic hyperandrogenism suppresses antral follicular development, a phenomenon often observed in polycystic ovarian syndrome (PCOS), whether and how deregulation of androgen receptor (AR) signaling is involved, is not well understood. In the present study, we examined the role of ring fing

  • Removal of mouse ovary fat pad affects sex hormones

     · but the LH receptor increased in ovary fat pad-removed mice. These results suggest that ovary fat pad is important for mouse reproduction. Introduction The normal folliculogenesis is a basis of high-quality oocyte formation. Follicle development starts during neonatal life when primordial follicles are formed in rodents.

  • Ovarian Folliculogenesis SpringerLink

     · Abstract. The ovary, the female gonad, serves as the source for the germ cells as well as the major supplier of steroid sex hormones. During embryonic development, the primordial germ cells (PGCs) are specified, migrate to the site of the future gonad, and proliferate, forming structures of germ cells nests, which will eventually break down to generate the primordial follicles (PMFs).

  • New insights on folliculogenesis and follicular

     · 131 surrounded by follicle cells in the stage III ovary of turbot (a, a1). Full secondary 132 growth (SGf) oocytes surrounded by a thick zona pellucida (ZP) and thin follicle cells (F) in the stage V ovary of turbot (b,133 b1). Numerous primary growth oocytes and early

  • Cellular and microvascular changes of the ovarian follicle

    Folliculogenesis Changes A Scanning of the Ovarian Electron Follicle Microscopic Study* Guido MACCHIARELLI, Enrico and Pietro M. MOTTA Department Received of Anatomy, February Medical VIZZA, School, Stefania University A. of Rome NOTTOLA, "La Sapienza", Giuseppe Rome, FAMILIARI Italy 20, 1992 and their ramifications. Maceration revealed the

  • Between-ovary interaction in the regulation of follicle

    This study was designed to examine effects of previous ovarian status on subsequent follicle growth and the role of between-ovary communication in the regulation of folliculogenesis and gonadotropin secretion during the primate ovarian cycle. Responses to luteectomy were compared in two groups of rhesus monkeys. In the first, follicle growth and corpus luteum function had been constrained

  • Abnormalities of early folliculogenesis and serum anti

     · To investigate abnormalities of early folliculogenesis and Anti-Müllerian hormone (AMH) concentrations in polycystic ovary syndrome (PCOS) patients, and to analyze the association between AMH and early-stage follicle densities (FD). A total of 175 patients underwent ovarian tissue cryopreservation in the first official cryobank in China, of which 16 patients aged 30–40 years old were

  • Follicle Growth and Development GLOWM

    Chronology. The steps and timing of human folliculogenesis are shown in Fig. 2. In women, folliculogenesis is a long process. 1,2,3 In each menstrual cycle, the dominant follicle that ovulates its egg originates from a primordial follicle that was recruited to initiate growth almost 1 year earlier (Fig. 2). In a broad sense, there are two types of follicles (Fig. 2) preantral (primordial