Results 31 to 40 of about 5,075 (171)
Nature Communications, 2022 Vitrification of preantral follicles is a promising strategy for female fertility preservation, but requires high concentrations of toxic cryoprotectants. Here, the authors accomplish follicle vitrification with low cryoprotectants by taking advantage of
Conghui Tian +5 more
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Activin promotes oocyte development in ovine preantral follicles
Reproductive Biology and Endocrinology, 2003 Activins have been implicated as important regulating factors for many reproductive processes. The aim of this study was to determine the effect of activin A on the development of ovine preantral follicles in vitro.
Telfer Evelyn E +2 more
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International Journal of Reproductive BioMedicine, 2020 Background: The improvement of in vitro maturation methods, which can activate the preantral follicle growth, plays a crucial role in the production of mature oocytes in reproductive technology.
Cyrus Jalili +3 more
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Morphometric and ultrastructural characterization of Bos indicus preantral follicles [PDF]
Animal Reproduction Science, 2005 The aim of the present study was to characterize the ultrastructure of zebu cow preantral follicles (PAFs). Ovarian cortex samples were processed for light and transmission electron microscopy. Primordial follicles consisted of an oocyte surrounded by one layer of flattened or flattened-cuboidal granulosa cells. The oocyte contained a large and usually
Kacinskis, Mirella Ávila +3 more
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Frontiers in Endocrinology, 2018 Androgen production by the ovary is an essential requirement for normal cyclical secretion of estradiol but its physiological role extends to important actions on both preantral and antral follicle development, including promotion of granulosa cell ...
Stephen Franks, Kate Hardy
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Comparative Biometrical and Follicular Study in Pig Ovary
Scientific Papers Animal Science and Biotechnologies, 2023 Porcine ovaries are a biological material frequently used in studies that analyze follicular development processes, oocyte maturation in close connection with the stages of the estrus cycle. Ovarian follicles and their degree of development represent the
Ion Valeriu Caraba
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New hyaluronan-based biomatrix for 3-D follicle culture yields functionally competent oocytes
Reproductive Biology and Endocrinology, 2022 Background Encapsulation of follicles within a biomatrix is one approach to maintaining 3-D follicle architecture during culture. Hyaluronan is one component of the natural extracellular matrix (ECM) that provides support to cells in vivo.
Nina Desai +4 more
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Light microscopical and ultrastructural characterization of goat preantral follicles [PDF]
Small Ruminant Research, 2001 Goat ovarian preantral follicles were morphologically and ultrastructurally described in this work. Primordial follicles are oocytes surrounded by one layer of squamous or squamous-cuboidal granulosa cells; primary follicles have a single layer of cuboidal granulosa cells, and secondary follicles are oocytes surrounded by two or more layers of cuboidal
Lucci, Carolina Madeira +4 more
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The optimized research of the in vitro culture of preantral follicles in mice [PDF]
Journal of Clinical Laboratory Analysis, 2020 AbstractObjectiveEfficiency of preantral follicle culture in vitro is low and is dependent on species, development stage, and follicle‐stimulating hormone (FSH) concentration. Here, we optimized the preantral follicle in vitro culture system in mice.MethodsThe primary follicles (PM follicles, 80‐100 μm diameter ) and early secondary follicles (ES ...
Xiyan Wang +7 more
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Journal of Ovarian Research, 2023 Polycystic ovarian syndrome (PCOS) is a complex multi-factorial syndrome associated with androgen excess and anovulatory infertility. In the current study, we investigated the role of dihydrotestosterone-induced exosomal miR-379-5p release in determining
Reza Salehi +19 more
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