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Characterization of follicle populations in mare ovaries: From preantral to preovulatory follicles
Introduction: The equine ovary is peculiar in that, unlike other mammalian ovaries, its germinal surface, where follicles and oocytes are found, is located at the organ’s central portion, while its conjunctive tissue and ...
Morphological and quantitative evaluation of buffalo preantral follicles in different reproductive phases
The objective of this research was to estimate the population of preantral follicles in prepubertal (P), adult (A) and pregnant (PR) female buffaloes, as well as to observe the different degeneration types and rates of ...
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 ...
Evidence that fibroblast growth factor 10 plays a role in follicle selection in cattle
(Csiro Publishing, 2017-01-01)
There is evidence that regulation of follicle selection in cattle involves locally produced growth factors. In the present study, we investigated the expression of members of the fibroblast growth factor (FGF) 7 family ...
Temporal interrelationships among luteolysis, FSH and LH concentrations and follicle deviation in mares
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
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 ...
Ovarian follicle count and plasma AMH concentration on Nelore and Angus heifers
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 ...