Results 11 to 20 of about 6,106 (203)
In vitro culture of bovine preantral follicles: a review [PDF]
Reproductive Biology and Endocrinology, 2014 Preantral follicles are the majority of the ovarian follicle population and their use as a source of homogeneous oocytes for bovine reproductive biotechnologies could result in a substantial advance in this field. However, while in other species embryos and offspring have been produced, in bovine species the results have been limited to the follicular ...
Araújo, Valdevane R +3 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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-growth and Gene Expression of Porcine Preantral Follicles Retrieved by Different Protocols [PDF]
Asian-Australasian Journal of Animal Sciences, 2012 This study was conducted to determine how the isolation method of the porcine preantral follicles influenced the following follicular growth in vitro. Mechanical and enzymatical isolations were used for retrieving the follicles from prepubertal porcine ...
J. I. Ahn +8 more
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Vitrification of bovine preantral follicles with dimethylsulfoxide and sucrose plus α-tocopherol
Pesquisa Veterinária Brasileira, 2016 : The objective of this study was to evaluate the vitrification of bovine preantral follicles with dimethylsulfoxide (D) and sucrose (S) plus α-tocopherol 5mmol/L (T5) or 10mmol/L (T10) and, evaluate the thawed with minimal essential medium (m) with or ...
Carolina R. Jimenez +4 more
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Isolation and characterization of preantral follicles from foetal bovine ovaries [PDF]
Veterinary Quarterly, 1994 A simple, mechanical method is described for the isolation of preantral follicles from bovine foetuses of 220-280 days of gestation. On average, 2918 + 621 (s.d.) preantral follicles were isolated per ovary. The isolated preantral follicles were characterized on the basis of the morphological appearance of the surrounding granulosa cells, the number of
Hulshof, S. C. J. +4 more
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Histological and ultrastructural analysis of cryopreserved sheep preantral follicles [PDF]
Animal Reproduction Science, 2006 The aim of this study was to verify the histological and ultrastructural characteristics of sheep preantral follicles after exposure of ovarian tissue to cryopreservation in glycerol (GLY), ethylene glycol (EG), propanediol (PROH) or dimethyl sulfoxide (DMSO) in order to determine the optimum method to store sheep ovarian tissue for later experimental ...
Santos, Regiane R. +8 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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SET protein up-regulated testosterone production in the cultured preantral follicles [PDF]
Reproductive Biology and Endocrinology, 2013 Background We found previously that the expression of SET gene was up-regulated in polycystic ovaries. Evidences suggested that SET protein was essential for regulating both the promoter activity of CYP17A1 and the biological activity of P450c17. In this
Xu Boqun +9 more
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Italian Journal of Animal Science, 2010 The objectives of the present study were to estimate the population of the normal and degenerated preantral follicles of buffaloes in different reproductive phases and to classify the different types of degeneration of ovarian preantral follicles.
L.S. Leal, E. Oba, F.C.A. Carvalho
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DTPA disrupts development of preantral ovarian follicles in vitro
Reproduction and FertilityDietary zinc deficiency disrupts fertility in vivo by impairing oocyte and embryo development near ovulation. Acute treatment of newborn ovaries with a strong intracellular chelator (TPEN), which preferentially binds zinc, disrupts follicular development.
James M Hester, Francisco J Diaz
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