Results 21 to 30 of about 5,075 (171)
Ultrastructure and viability of isolated bovine preantral follicles [PDF]
Human Reproduction Update, 1998 Techniques for the isolation of ovarian follicles and maturation of oocytes in vitro have enormous reproductive potential. Preservation of normal tissue function is vital. This study emphasizes the ultrastructure and viability of mechanically isolated bovine small (diameter 40-100 microm) preantral and large (140-450 microm) preantral/early antral ...
R, van den Hurk +5 more
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Journal of Animal Reproduction and Biotechnology, 2019 The objective of this study was to establish an in vitro culture system for ovarian preantral follicles of B6D2F1. First, we optimized the in vitro preantral-follicle culture by culture duration, follicle stimulating hormone (FSH) type, and activin A ...
Jung Kyu Choi
doaj +1 more source
Hayati Journal of Biosciences, 2021 The structure of follicular tissue affects the ability to maintain the structural integrity of follicles against cryoinjury post-vitrification. Histological analysis was conducted on the structural integrity of each stage of preantral follicles post ...
Nova Anita +4 more
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Inhibin A and B secretion in mouse preantral follicle culture [PDF]
Human Reproduction, 1998 Conditioned media from single mouse ovarian follicles cultured from the early preantral stage up to complete maturity were analysed for different immunoreactive inhibin forms. The inhibin assays measured (i) alpha-specific inhibin, as represented by a mix of 32 and and 57 kDa inhibins, inhibin precursors, alpha-subunit and its precursors; (ii) dimeric ...
Smitz, Johan, Cortvrindt, R.
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Oocyte-granulosa-theca cell interactions during preantral follicular development
Journal of Ovarian Research, 2009 The preantral-early antral follicle transition is the penultimate stage of follicular development in terms of gonadotropin dependence and follicle destiny (growth versus atresia).
Orisaka Makoto +3 more
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Cryopreservation and characterization of canine preantral follicles
Cryobiology, 2018 The aim of this study was to define the population, morphological and ultrastructural characteristics of bitch preantral follicles (PAFs) and to compare the effects on the morphology of PAF of two cryopreservation techniques - slow freezing (SF) and vitrification (V) - of bitches' ovarian tissue. The average population (number per ovary) of PAFs was 48,
J.L.P.R. Jivago +5 more
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In Vitro Growth of Preantral Follicle and Maturation of Intrafollicular Oocyte from Aged Mice
Journal of Animal Reproduction and Biotechnology, 2019 This study aimed to recover the ovarian function through in vitro culture of preantral follicles from aged mice. First, we isolated the preantral follicles from ovaries of sixty-seven-week old B6D2F1 mice with decreased fecundity to know how many ...
Jung-Ah Yoon, Jung-Kyu Choi
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In vitro development of pig preantral follicles [PDF]
Bioscientifica Proceedings, 2020 A limiting factor to realizing the full potential of many of the new reproductive techniques is the lack of abundant numbers of fertilizable oocytes. This problem could be addressed by using the large source of oocytes available from preantral and primordial follicles by developing systems for in vitro growth.
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Ovarian features in white-tailed deer (Odocoileus virginianus) fawns and does.
PLoS ONE, 2017 The knowledge about ovarian reserve is essential to determine the reproductive potential and to improve the methods of fertility control for overpopulated species, such as white-tailed deer (Odocoileus virginianus). The goal of this study was to evaluate
G D A Gastal +8 more
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Cryopreservation of Preantral Follicles
, 2018 In mammals, the total number of female germ cells is already established by the time of birth, meaning that no mitosis will take place in oogonias thereafter. Their cryostorage, therefore, depends on ovarian tissue manipulation. As an alternative to mature oocyte cryopreservation, the maintenance of inactive preantral follicles is a remarkable option ...
Rivas Leonel, Ellen Cristina +2 more
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