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Relationship between follicle size and ultrasound-guided transvaginal oocyte recovery
(Elsevier B.V., 2001-07-03)
We evaluated the relationship between follicle size and oocyte recovery (OR) using ultrasound-guided follicle aspiration. Thirty Holstein cows were subjected to OR without gonadotrophic therapy. Oocytes were recovered two ...
Temporal interrelationships among luteolysis, FSH and LH concentrations and follicle deviation in mares
(2000-03-01)
The effect of altered LH concentrations on the deviation in growth rates between the 2 largest follicles was studied in pony mares. The progestational phase was shortened by administration of PGF2α on Day 10 (Day 0=ovulation; ...
Dynamics of follicle populations and gonadotropin concentrations in fillies age two to ten months
(Equine Veterinary Journal Ltd, 2000-11-01)
Follicle populations and concentrations of circulating gonadotropins were studied during age 2-10 months in 10 spring-born pony fillies. Blood sampling and ultrasound scanning were done every 4 days and daily for four 30 ...
Expression of LH receptor mRNA splice variants in bovine granulosa cells: Changes with follicle size and regulation by FSH in vitro
(Wiley-Blackwell, 2007-06-01)
In cattle, most evidence suggests that granulosa cells express LH receptors (LHR) after (or as) the follicle becomes dominant, however there is some suggestion that granulosa cells from smaller pre-dominant follicles may ...
Follicle profile and plasma gonadotropin concentration in pubertal female ponies
(Associação Brasileira de Divulgação Científica (ABRADIC), 2004-06-01)
Twelve female ponies were examined daily for 30 days and classified as ovulating (OV; N = 6; 197 ± 6 kg) or prepubertal (PP; N = 6; 196 ± 9 kg). Follicles were detected by ultrasound and gonadotropins quantified by ...
Role of luteinizing hormone in follicle deviation based on manipulating progesterone concentrations in mares
(1999-12-10)
The effects of several doses of progesterone on FSH and LH concentrations were used to study the role of the gonadotropins on deviation in growth rates of the two largest follicles during the establishment of follicle ...
Follicular dynamics and plasma FSH and progesterone concentrations during follicular deviation in the first post-ovulatory wave in Nelore (Bos indicus) heifers
(2007-04-01)
The objective of the present study was to characterize ovarian follicular dynamics and hormone concentrations during follicular deviation in the first wave after ovulation in Nelore (Bos indicus) heifers. Ultrasonographic ...
Morphologic and quantitative evaluation of preantral follicles of buffalo (Bubalus bubalis) in different reproductive phases
(Pagepress Publ, 2007-01-01)
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 ...
Expression and function of fibroblast growth factor 10 and its receptor, fibroblast growth factor receptor 213, in bovine follicles
(Soc Study Reproduction, 2007-10-01)
Some fibroblast growth factors (FGFs) affect ovarian follicle cell growth and/or differentiation. Whereas many FGFs activate several FGF receptors, FGF7 and FGF10 primarily activate only one, FGFR2B. As FGF7 is produced ...
Effects of ascorbic acid on in vitro culture of bovine preantral follicles
(2012-11-01)
The objective of this study was to evaluate the effects of adding ascorbic acid to the media for in vitro culture of cattle ovarian fragments and to determine their effects on growth activation and viability of early-stage ...