Results 11 to 20 of about 5,100 (172)

Preantral follicle population and distribution in the horse ovary

Reproduction and Fertility, 2022
Characterization of the ovarian preantral follicle population is a necessary step to improve understanding of folliculogenesis and ovarian physiology. Therefore, in the present study, the preantral follicle population in the equine ovary in young and old
Kendall A Hyde, Francisco L N Aguiar, Benner G Alves, Kele A Alves, Gustavo D A Gastal, Melba O Gastal, Eduardo L Gastal   +6 more
doaj   +4 more sources

DTPA disrupts development of preantral ovarian follicles in vitro

Reproduction and Fertility
Dietary 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
doaj   +4 more sources

Characterization of preantral follicle clustering and neighborhood patterns in the equine ovary

PLoS ONE, 2022
Understanding the transition from quiescent primordial follicles to activated primary follicles is vital for characterizing ovarian folliculogenesis and improving assisted reproductive techniques.
Kendall A. Hyde, Francisco L. N. Aguiar, Paula B. Alvarenga, Amanda L. Rezende, Benner G. Alves, Kele A. Alves, Gustavo D. A. Gastal, Melba O. Gastal, Eduardo L. Gastal   +8 more
doaj   +2 more sources

Review: Roles of follicle-stimulating hormone in preantral folliculogenesis of domestic animals: what can we learn from model species and where do we go from here?

Animal, 2023
The pituitary gonadotropin FSH is a glycoprotein critical for the development of ovarian follicles. Upon binding to its G protein-coupled membrane receptor located on the granulosa cells of ovarian follicles, FSH elicits a cascade of downstream ...
Amanda J. Morton, Juliana I. Candelaria, Stephanie P. McDonnell, Daniel P. Zgodzay, Anna C. Denicol   +4 more
doaj   +1 more source

The Mare Model to Study the Effects of Ovarian Dynamics on Preantral Follicle Features. [PDF]

PLoS ONE, 2016
Ovarian tissue collected by biopsy procedures allows the performance of many studies with clinical applications in the field of female fertility preservation.
Kele A Alves, Benner G Alves, Gustavo D A Gastal, Saulo G S de Tarso, Melba O Gastal, José R Figueiredo, Maria L Gambarini, Eduardo L Gastal   +7 more
doaj   +1 more source

-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, S. T. Lee, J. H. Park, J. Y. Kim, J. H. Park, J. K. Choi, G. Lee, E. S. Lee, J. M. Lim   +8 more
doaj   +1 more source

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, Gastal, Melba O, Figueiredo, José R, Gastal, Eduardo L   +3 more
openaire   +2 more sources

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, E R, Spek, W J, Hage, T, Fair, J H, Ralph, K, Schotanus   +5 more
openaire   +2 more sources

The optimized research of the in vitro culture of preantral follicles in mice. [PDF]

J Clin Lab Anal, 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 ...
Wang X, Wang L, Sun Y, Wu D, Li J, Zhu L, Jiang S, Pan X.   +7 more
europepmc   +4 more sources

Effects of Culture Duration, Follicle Stimulating Hormone (FSH) Type, and Activin A Concentration on In Vitro Growth of Preantral Follicles and Maturation of Intrafollicular Oocytes

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