Results 271 to 280 of about 55,590 (315)
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The ovarian follicle and fertility
The Journal of Steroid Biochemistry and Molecular Biology, 1991The precise roles of follicle stimulating hormone (FSH) and luteinizing hormone (LH) in the control of preovulatory follicle growth has been re-examined. Suppression of both pulsatile LH secretion and FSH or specific suppression of FSH results in an inhibition of preovulatory follicle growth beyond 2.5 mm dia.
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Hemorrhagic ovarian follicles in llamas
Theriogenology, 1991The ovaries of 74 llamas were examined daily by transrectal ultrasonography for at least 30 d. Hemorrhagic follicles were observed in 13 (18%) llamas (incidence per anovulatory dominant follicle, 16%). The proportion of llamas in which a hemorrhagic follicle was detected was different among groups (nonmated, 8/25; mated to a vasectomized male, 4/21 ...
O.J. Ginther, J. Sumar, Gregg P. Adams
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Ovarian control of follicle development
American Journal of Obstetrics and Gynecology, 1995A variety of ovarian autocrine and paracrine factors may modulate folliculogenesis and steroid production. The developmental program that leads to the production of a dominant follicle involves a precise quantitative and temporal pattern of expression of a large number of genes.
Douglas R. Danforth +3 more
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In vitro culture of ovarian follicles
Reviews of Reproduction, 1997This review offers a practically oriented introduction to follicle culture in vitro, focusing on mouse follicles, but with reference to other species. The main principles of follicle growth are addressed, including the constraints of tissue culture, methods of follicle isolation, and techniques for individual and collective culture of intact follicles.
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Effects of melatonin on ovarian follicles
European Journal of Obstetrics & Gynecology and Reproductive Biology, 2013To evaluate the histomorphometry and expression of Ki-67 and c-kit in ovarian follicles of pinealectomized or melatonin-treated pinealectomized rats.Forty adult rats were randomly divided into four groups of 10 animals: Group I - control; Group II - sham-pinealectomized; Group III - pinealectomized (Px), and Group IV - Px treated with melatonin (10μg ...
Maganhin, Carla Cristina UNIFESP +6 more
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Zebrafish ovarian follicle transcriptome [PDF]
, 2007 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 772. Global Gene Expression Profiling of Teleost Fish Ovaries and Fully Grown Follicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 782.1. Methods for Gene Expression Profiling . . . . . . . . . . . . . . . . . . . . . 782.
Knoll-Gellida, Anja, Babin, Patrick
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Can ovarian follicles fossilize?
Nature, 2013ARISING FROM X. Zheng et al. , 507–511(2013)10.1038/nature11985 In a recent report Zheng et al. describe ovarian follicles in three fossil birds from the Early Cretaceous period of China belonging to Jeholornis and two enantiornithine species1.
Albrecht Manegold, Gerald Mayr
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Follicle culture after ovarian cryostorage
Maturitas, 1998Cryostorage of ovarian cortical tissue, before devastating chemo- and/or radiotherapy for cancer, permits survival of primordial and early preantral follicles. This work aims for a system allowing the long-term maturation in vitro (IVM) of small immature oocytes up to fertilisable metaphase II oocytes.A culture system allowing follicle attachment ...
Smitz, Johan, Cortvrindt, R.
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Orexin system in swine ovarian follicles
Domestic Animal Endocrinology, 2018Successful reproduction is strictly linked to metabolic cues. The orexins are a family of hypothalamic neurohormones, well known for their key role in the control of food intake and the involvement in several aspects of the reproductive process. The biological actions of both orexins are carried out through binding to the related Orexin 1 (OX1R) and ...
R. Ciccimarra +11 more
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The bovine dominant ovarian follicle
Journal of Animal Science, 2007Central roles in reproductive biology (i.e., growth and development of the oocyte, steroidogenesis, and ovulation) are played by the ovarian dominant follicle (DF). The DF is different from other follicles because it can escape atresia (the fate of all other follicles), and if exposed to the LH surge, its cells will differentiate into the corpus luteum.
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